The recessive alleles for yellow body (yb) and cut wings (cw) identify two autosomal genes on the second chromosome of Drosophila melanogaster. When females, heterozygous at these two genes (yb+yb cw+cw), were crossed with yellow-bodied, cut-winged males, the following classes and numbers of progeny (out of 1000) were obtained:
a. wild type body color, wild type wings 120
b. wild type body color, cut wings 360
c. yellow body color, cut wings 140
d. yellow body color, wild type wings 380
Answers
Answer:
Option D
Explanation:
Given -
recessive alleles for yellow body is (yb) and cut wings is (cw)
Genotype of female parent which is heterozygous at these two genes - yb+yb cw+cw
Genotype of male with yellow-bodied, cut-winged is (ybyb, cwcw)
Cross between
yb+yb cw+cw & ybyb cwcw will produce following offspring
Please see the attached file
Hence, option D is correct
Related Questions
Argue that nature (including living things, ecosystems, species, etc) has intrinsic value.? If nature does have intrinsic value, how do we determine the values of individuals versus species, or the value of ecosystems versus individuals or species?
Answers
Answer:
The value of the different levels of organization can be determined by the scope or impact of a general level. It is more important to protect a species than an individual since the species encompasses a greater number of individuals and if the impact becomes extinct it is greater at the ecosystem level because ecological relationships would be affected.
On the other hand, it is more important to protect an ecosystem than a species because the macro is approached so that the levels of organization below it are naturally protected.
A science class is studying solubility, so they perform a lab to answer the question, "How does temperature affect the solubility of sugar in water?" The results of their experiment appear below.
Amount of Sugar Dissolved at Different Temperatures
Temperature (°C) Grams of sugar that dissolved
in 100 g water
0 180
20 205
40 240
60 280
80 360
100 490
Which of the following conclusions best answers the experimental question?
A.
All of these statements are valid answers to the experimental question.
B.
Sugar is composed of carbon, hydrogen, and oxygen atoms covalently bonded together.
C.
The solubility of sugar in water is 490 g sugar/100 g water at 100°C.
D.
The solubility of sugar in water increases with an increase in temperature.
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Answers
Answer: It is D. The solubility of sugar in water increases with an increase in temperature.
Explanation:
Answer: Option D
Explanation:
The sugar dissolves in water to make a homogeneous solution. Amount of sugar that is dissolved in 100 gram of water varies at different temperature.
The dissolution of sugar in water at different temperatures is called solubility.
It is seen that the solubility of sugar in water increases with increase in the temperature.
Hence, the correct answer is option D
Which of the following is not a property of water?
Group of answer choices
A.ability to adhere to other substances
B.ability to moderate temperatures
C.ability to contract upon freezing
D.ability to dissolve a wide variety of substances
Answers
Answer: Ability to contract upon freezing
Explanation:
Water is a universal solvent. It has the ability to dissolve different types of solute in the water.
It has the property of adhesion and cohesion. Cohesion can be defined as the combining of two or more water molecules.
Adhesion can be defined as the ability of the water molecules to adhere different substances.
It can be used as an cooling agent in order to moderate the temperature when the temperature is very high.
The correct answer as to which is not a property of water would be the ability to contract upon freezing. The correct option would, therefore, be C.
Water has the ability to adhere to other substances, also known as adhesive property.Water has the ability to moderate temperatures due to its high heat capacity.Water has the ability to dissolve a wide variety of substances due to its polarity and the presence of hydrogen bonds in its structure.However, water expands, rather than contracts upon freezing and this is particularly due to the expansion of the hydrogen bonds.
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What examples of human behavior have you seen that seem to have been inherited from our ancestors because they helped individuals survive and adapt more effectively? Why do you think they are inherited?
Answers
Answer:
Domesticating plants and animals
Fear of snakes and spiders
Social roles and cooperation
Explanation:
The reason that we inherited these traits from our ancestors is that they confer an advantage in the environment in which we live. This process occurred through natural selection pressures that power evolution. Individuals that bore these traits had higher chances of reaching reproductive age and passing down their genes. Individuals without these traits died sooner hence their genes reduced with every generation.
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A lab assistant needs to mix up the following reaction to prepare DNA for an experiment:
25ul of a DNA sample
25ul of enzyme
50ul of reaction buffer
400ul of water
The smallest size tube that will hold the entire reaction is ??? [0.05, 0.5, or 5] ml:
Which of the following pipetting devices most likely would not be used by the lab assistant to measure the needed volumes?? [P20, P200, P1000]?
The enzyme comes as a concentrated solution of 20 Units of activity per ul. Therefore, the reaction mix will have ??? total Units of the enzyme at a working dilution of ??? Units/ul.
Answers
Answer:
The smallest size tube that will hold the entire reaction is 0.5ml
Explanation:
25ul (DNA sample) + 25ul (enzyme) + 50ul (buffer) + 400ul (water) = 500ul total
since 1000ul=1ml, then 500ul = 0.5ml
Answer:
The device that mostlikely would not be used P20
Explanation:
P20 is a pipette used to measure and sample volumes of 20ul maximum.
Answer:
The reaction mix will have 400 units of the enzyme.
The working dilution will be 0.8 Units/ul.
Explanation:
The mix has 20ul of the enzyme which is 20Units/ul. Then we have 20ulx20Units/ul= 400 Units of enzyme in the mix.
Since the final volume is 500ul, the final concentration 400Units/500ul=0.8 Units/ul.
The chemical basis of blood group specificity resides in the carbohydrates displayed on the surface of red blood cells. Carbohydrates have the potential for great structural diversity. Indeed, the structural complexity of the oligosaccharides that can be formed from four sugars is greater than that for the oligopeptides from four amino acids. What properties of carbohydrates make this great structural diversity possible?
Answers
The structural diversity of carbohydrates enabling blood group specificity is due to the varied structures that oligosaccharides can form, including linear and branched forms, the presence of isomeric forms of monosaccharides, and different glycosidic linkages. These factors contribute to the complexity and vast potential for variation in carbohydrate structures on red blood cells, thereby determining blood type compatibility.
Explanation:The great structural diversity of carbohydrates, which underpins the specificity of blood groups, is attributed to several key properties of carbohydrates. First, the structure of oligosaccharides attached to red blood cells plays a crucial role in determining blood type and compatibility.
Unlike peptides, carbohydrates can form linear and branched structures, significantly increasing the complexity and diversity from even a small number of monosaccharides. Second, the monosaccharide units themselves come in various isomeric forms, which allows for even more variation. Moreover, the types of bonds (such as glycosidic linkages) between these sugar units further contribute to the complexity and functionality of the oligosaccharides on red blood cells.
This remarkable diversity enables the immune system to recognize and distinguish between self and non-self cells, preventing the agglutination that can occur when incompatible blood types are mixed.
A child is born with curly hair like her mother's and blue eyes like her father's. Why does the child have these features?
Answers
Answer:
"Men have one X chromosome, from their mother, and one Y chromosome, from their father. Because of this, a man will pass his copy of the X chromosome—and the genes it contains—only to his daughters and his copy of the Y chromosome only to his sons. Women have two alleles of every gene on the X chromosome, one inherited from their father and one from their mother. Men have a single allele of each gene on the X chromosome, inherited from their mother, and a single allele of each gene on the Y chromosome, from their father."
Explanation:
https://genos.co/resources/inherited.html
Answer:
The child inherited features through DNA from both parents is the correct answers.
Explanation:
It is necessary to remember that the child receives the chromosomes from his parents: the mother gives him one X chromosome while the father gives the child an X chromosome. Due to this, the child receives characteristics from both of them, which result in the blue eyes and the curly hair.
"A dominant gene b+ is responsible for the wild-type body color of Drosophila; its recessive allele b produces black body color. A testcross of a heterozygous b+/b female by a black b/b male gave 52 black and 58 wild-type progeny. If a black female from these progeny were crossed with a wild-type brother, what phenotypic ratios would be expected in their offspring?"
Answers
Answer:
50% wild type and 50% black i.e. 1:1 phenotypic ratio
Explanation:
Given, b+ = wild type allele
b = recessive allele
b+b+ = dominant wild type
b+b = heterozygous wild type
bb = recessive black
First cross: female b+b (wild type) X male bb (black) = bb, bb, b+b, b+b
Since bb and b+b are in 1:1 phenotypic ratio, 52 black and 58 wild type progeny are produced.
From this progeny second cross occurs between:
female bb (black) X male (wild type) b+b = bb, bb, b+b, b+b
Again the same 1:1 phenotypic ratio is obtained. Half of the progeny will be be black (bb), other half will be wild type (b+b).
Select all molecules that are considered to be macromolecules. Check all that apply. An mRNA that will be translated to make a catabolic enzyme An mRNA that will be translated to make a catabolic enzyme An individual lipid found in a cell membrane An individual lipid found in a cell membrane A protein that is involved in DNA replication
Answers
Answer:
All given options are correct.
Explanation:
Biomolecules may be defined as the organic molecules that are present in the living organism. Four important biomolecules are proteins, carbohydrates, fats and nucleic acids.
The biomolecules are known as macromolecules because they are made of large units of molecule. The mRNA that translates to form a enzymes is macromolecule because RNA is made of large units of nucleotides. Lipid that found in cell membrane are macromolecules because they are made of more than 1000 atoms. Protein that are involved in DNA replication are macromolecules as they have large units of amino acids.
Thus, all the given option are correct.
Macromolecules are large, complex molecules essential to life, such as proteins and nucleic acids. Proteins produced by translation of mRNA and those involved in DNA replication are considered macromolecules, whereas individual lipids are generally not, due to their smaller size and simplicity.
Explanation:Biological macromolecules are essential large molecules in living organisms, composed of smaller building blocks. There are four major classes of biological macromolecules: carbohydrates, lipids, proteins, and nucleic acids. Among these, proteins and nucleic acids like mRNA are typically considered to be macromolecules because of their large and complex structures.
Proteins, including enzymes involved in catabolism and those that play a role in DNA replication, are synthesized through a process known as translation or protein synthesis. This involves decoding an mRNA by the ribosome to produce a polypeptide chain that folds into a functional protein. Proteins are not only functional as enzymes but also provide structural support, making them macromolecules by definition.
On the other hand, individual lipids found in cell membranes are not typically categorized as macromolecules because they are smaller and not as complex compared to proteins and nucleic acids. However, when lipids form complex structures like the phospholipid bilayer of cell membranes, the entire structure could be considered a macromolecule.
An mRNA that will be translated to make a catabolic enzyme and a protein that is involved in DNA replication are considered macromolecules.
Which statement(s) is(are) TRUE regarding the vessels of the vascular system and the lymphatic system. A) Lymphatics are usually packaged together in connective tissue sheaths with blood vessels and pulsating expansions of the nearby arteries also promote lymph flow. B) Mechanisms that promote venous return in blood vessels also act within lymphatic vessels. C)Vessels of the vascular system are relatively high-pressure conduits compared to vessels of the lymphatic system. D)None of the above. E)All of the above.
Answers
Answer: B) Mechanisms that promote venous return in blood vessels also act within lymphatic vessels.
Explanation:
- One of the functions of the lymphatic system is to reabsorb fluid that leaks out of the vascular network into the interstitium and to return it to the general circulation. The lymphatic system is markedly different from the circulatory system in both function and structure. Lymphatic vessels are thin-walled with valves, and most resemble veins; when stretched, the vessels contract and propel lymph along the vessel. The lymphatic vessels begin blindly, deep in the body's connective tissue. Lymphatic capillaries possess one-way valves. These valves permit the uptake of fluid from the body but do not allow the fluid to flow back out of the capillaries into the intracellular spaces. It allows for leakage from the vascular system to be reabsorbed into the body's circulation system.
True statements regarding the vascular and lymphatic systems are B) that mechanisms that assist venous return also aid lymph movement, and C) that vascular system vessels have higher pressure than the lymphatic vessels.
Explanation:Regarding the vessels of the vascular and lymphatic system, the following statements are TRUE:
B) Mechanisms that promote venous return in blood vessels also act within lymphatic vessels. This includes the contraction of skeletal muscles and the presence of one-way valves to assist the flow of lymph.C) Vessels of the vascular system are relatively high-pressure conduits compared to vessels of the lymphatic system, which are not pressurized by the heart and rely on body movements for lymph flow.While statement A regarding lymphatics being packaged together in connective tissue sheaths with blood vessels is true, the part about pulsating expansions of nearby arteries promoting lymph flow is not accurate. Thus, statement E (All of the above) is not correct as not all included statements are true.
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Relative to prokaryotic cells, eukaryotic cells are usually ______. Relative to prokaryotic cells, eukaryotic cells are usually ______. larger and more complex smaller and more complex smaller and simpler larger and equally complex
Answers
Answer:
Relative to prokaryotic cells, eukaryotic cells are usually larger and more complex.
Ecosystem services ________. contribute to keeping ecosystems productive are actions humans must take in order to protect and serve the environment are economically valuable services provided by natural systems are valuable to natural systems but not to human-created systems are required to rebalance natural systems that we have disturbed
Answers
Answer: are economically valuable services provided by natural systems
Explanation: In simple words, ecosystem services refers to the services that the humans receives from the ecosystem they live in. These are the resources provided by the nature that have economic values.
Examples of such resources could be food and fiber, fresh water etc.
In other words, ecosystem means the direct or indirect contribution made by the nature for the survival of humans.
Ecosystem services are economically valuable services provided by natural systems. Option 3 is correct.
Ecosystem services refer to the benefits that humans receive from ecosystems, such as food, fiber, clean water, pest and disease control, medicines, recreational activities, and natural hazards like floods.
The ecosystem services provided by forests and grasslands go beyond food, fuel, and fiber. Forests clean air, filter water, reduce floods and erosion, support biodiversity, and conserve genetic resources. They also provide recreational, educational, and cultural opportunities.
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Experimental studies reveal that double-stranded DNA can exist in three different helical forms known as A, B, and Z DNA. Why do molecular biologists primarily focus on B DNA?
Answers
Answer:
The correct answer is - B-DNA is the most common form of the DNA present in the cell and a good approximation of the structure of DNA in the cell.
Explanation:
The B- DNA is a form of the DNA that is explained by Watson and crick by the double-helical structure model. B-DNA is the predominant form of the DNA out of the three forms of the DNA which are B-DNA, Z-DNA, and A-DNA.
B-DNA is is provide a good approximation of the structure of DNA in a cell and its most common form of DNA in a cell that makes it the most studied and focused form of DNA.
Thus, the correct answer is - B-DNA is the most common form of the DNA present in the cell and a good approximation of the structure of DNA in the cell.
Answer:
B-DNA is the helical form most commonly found in nature.
Explanation:
Even though there are three different helical forms of DNA, molecular biologist primarily focus on B-DNA because is the most commonly found in nature. A very small proportion of Z-DNA is found in negatively supercoiled DNA, and A-DNA is formed when the DNA is facing dehydrating conditions. However, B-DNA is the prominent and active form found in nature, therefore is the most studied.
In a classic experiment that demonstrated the semiconservative nature of DNA replication, cells were grown first in 14N-containing media and later in 15N-containing media, and DNA was separated by
Answers
Answer:
Cesium chloride density gradient centrifugation
Explanation:
Centrifugation is a technique that separates the one type of molecules from the others based on some physical properties such as density, shape, molecular weight, etc.
Meselson and Franklin Stahl grew the E coli cells in the N-14 and N-15 medium. They isolated the DNA from E coli cells and separated the double helices by centrifugation in a cesium chloride density gradient.
The technique of density gradient centrifugation separates the heavy-heavy, light-light, and heavy-light DNA double helices into distinct bands as they differ from each other with respect to density.
A scientist working in the freil wants to determine the approximate pH of swamp water using a simple and inexpensive technique. Which tool should the scientist use to measure an approximate pH
Answers
Answer:
Ph paper
Explanation:
Which statement is NOT true about catabolic pathways? Which statement is NOT true about catabolic pathways?
a. They have a net consumption of ATP.
b. They liberate smaller molecules from larger ones.
c. They have a net release of energy.
d. They include the citric acid cycle.
Answers
Answer:
A
Explanation:
Option A is your answer, because in catabolic pathways ATP is released, not consumed. Besides, other options describes catabolic pathways as such.
The ATP energy is consumed in anabolic pathways, the opposite to catabolic. Maybe you thought that option D is the NOT TRUE, but actually the citric acid cycle is involved in catabolic pathways.
When a colloid such as gelatin forms, which molecule does the process of protein coagulation entrap?
Answers
Answer:
Water
Explanation:
When a colloid such as a gelatin forms, water is entrapped by the process of protein coagulation.
Colloids can be describes as particles of solid having spherical diameter between 1 and 100 nm which are dispersed in the liquid medium. Coagulation can be described as a process in which particles aggregate and lead to the formation of flocs. Flocs can either settle in water or can easily be seperated from water.
Final answer:
In the formation of a colloid like gelatin, the process of protein coagulation entraps water molecules, leading to the formation of a gelatinous substance when it cools.
Explanation:
When a colloid such as gelatin forms, the process of protein coagulation entraps water molecules. Proteins like those in gelatin are hydrophilic, with surfaces covered in polar or charged groups that interact with water, creating a shell that protects against aggregation. Upon heating, these protective shells are disrupted, allowing the proteins to unfold and expose hydrophobic groups that cause the particles to aggregate and form a gel. In the case of gelatin, when it cools, it coagulates, trapping water within a complex three-dimensional network, thus transitioning into a gel, which is a highly viscous substance.
A fish die when taken out of water while a rat kept under water dies . What availibility allows the rat and fish to sirvive in their respecrive habitat
Answers
Deforestation ________.
a. diminishes the trees' ability to purify water
b. increases greenhouse gases
c. fosters replication of endangered species
d. increases the availability of resources to humans
e. minimizes the flow of water, but increases the quality of the water we drink
Answers
Answer: Option B
Explanation:
Deforestation can be defined as the cutting down of trees in huge number. This act increases the amount of green house gases in the environment.
This is so because the carbon dioxide which is an important green house gas is absorbed by the trees which reduces the concentration of green house gas and thus decreases green house effect.
But lesser number of plants will increase the amount of carbon dioxide in the atmosphere thus increasing the green house effect.
Steroids are classes of lipids that include cholesterol, sex hormones, and cortisone. Steroids are not hydrocarbon chains like triglycerides, but instead contain four fused carbon rings. Although steroids can bond to fatty acids, steroid molecules do not contain a fatty acid chain, and the monomer of a steroid biomolecule is difficult to define. Which of these does NOT correctly pair a steroid and its function?
A) Cholesterol is an energy source.
B) Cholesterol decreases cell membrane fluidity.
C) Estrogen contributes to the development and maintenance of female secondary sex characteristics.
D) Cortisol can help control blood sugar levels, regulate metabolism, help reduce inflammation, and assist with memory formulation.
Please answer quickly and thank you
Answers
Answer:
A
Explanation:
Cholesterol is not an energy source in the body. It is used to make Vitamin D, and hormones such as cortisol, estrogen, and progesterone, and digestive fluids like bile.
Cholesterol increases membrane fluidity, especially at lower temperatures when the cell membrane would freeze. This is because the molecule intercalates between the fatty acid chains of the lipid layer of the cell membrane. This prevents the lipids from packing tightly together which would cause the membrane to be rigid. However, it does decrease membrane fluidity at high temperatures preventing the cell membrane from melting at temperature that is higher than its melting point.
Answer:
the answer is A.
Explanation:
this is the correct answer
An organism grew well on TSA plates, a bit slower on MM1 and not at all on MM1 without glucose. The results indicate that organism is not fastidious since it __________.
Answers
Answer:
Can grow on MM1.
Explanation:
Organisms that can only grow in a media having specific nutrients included in it are called a fastidious organism, this implies that these organisms have specific nutrient requirements for their growth. MM 1 represents the minimal media which has basic nutrients present in it, however as the fastidious organisms require some particular or complex nutrients for their growth they can not grow on the minimal media. Therefore, since the organisms that are given in the question is able to grow on the minimal media MM1, this implies that it is not a fastidious organism.The bone that is attached to the eardrum is called the ________; the bone that is connected to the oval window is called the ________. hammer (malleus); stirrup (stapes) anvil (incus); stirrup (stapes) hammer (malleus); anvil (incus) stirrup (stapes); hammer (malleus)
Answers
Answer:
hammer (malleus); stirrup (stapes)
Explanation:
Middle ear lies between eardrum and oval window. It transmits sound from outer to inner ear. It has three bones: hammer (malleus), anvil (incus) and stirrup (stapes).
Eardrum vibrates due to sound waves. This vibration is transmitted further via the three bones of middle ear. They are arranged as hammer, anvil and stirrup starting from eardrum till oval window. Hence, hammer is the bone which is in direct contact with eardrum and stirrup is the bone directly connected to oval window. Oval window is a membrane that covers the entrance to cochlea in inner ear.
Gram-__________ cells are more susceptible to penicillin than Gram-______________ cells because the thick ___________ cell walls of Gram-positive cells are critical for their function. Gram-negative cells also contain an outer_______________, which excludes small molecules, such as antibiotics.
Answers
Answer:Gram positive bacteria is more susceptible to penicillin because the peptidoglycan, which forms the cell wall, is directly exposed to the drug. On the other hand, gram negative cell walls have a layer of lipopolysaccharide, and a few other layers, and then the peptidoglycan is there. Therefore, for the penicillin to reach the gram negative peptidoglycan it has to travel through the other layers first
Explanation:
could someone pls help me this is due tomorrow
Answers
Answer:
Your answer is below
Explanation:
The first picture shows a cell membrane inside the protein there is a protein that needs energy to carries a molecule. Then, picture a is active transport, it needs energy.
The second picture shows a cell membrane that is that is eating a molecule then this picture shows a endocytosis process. It needs energy.
The third picture shows a cell membrane and a protein inside it, but it doesn't needs energy to carries a molecule, then this picture is an example of facilitated diffusion.
The fourth picture shows a membrane that is excreting wastes or molecules, then this picture is exocytosis. It needs energy.
Arrange the following in the proper sequence in which they occur during a single PCR cycle.
1. Addition of DNA nucleotides by Taq DNA polymerase.
2. Complementary base pairing between primers and target DNA.
3. Heat separation of strands of target DNA.
Answers
Answer:
The correct order is 3 - 2 - 1
Explanation:
In order for DNA replication to occur, both strands need to be separated so the polymerase can start adding nucleotides. In a PCR, this is achieved by an increase in temperature. After both strands are separated, a DNA primer binds the sequence from which the replication will start. This is because DNA polymerases need a short complementary sequence to attach to before they start replicating. Once both strands are separated and primers are paired to DNA, Taq Polymerase can start adding nucleotides to complete the cycle.
Suppose the genes for eye color and wing shape are both on the X chromosome (they are linked) and are known to be 68 map units apart. In a mating between a Xw+m+Xwm female and a XwmY male that produces 1000 progeny, how many recombinant progeny would you expect to observe?
Answers
Answer:
500
Explanation:
The greater the distance between two linked genes, the higher the chances of crossing over happening between them. If genes are in the same linkage group but separated by 50 or more map units, they will assort independently from each other during meiosis.
The female will produce the following gametes, each with a 1/4 proportion:
• Xʷ⁺ᵐ⁺ (parental)
• Xʷᵐ (parental)
• Xʷ⁺ᵐ (recombinant)
• Xʷᵐ⁺ (recombinant)
In an offspring of 1000 individuals, half of them are expected to be recombinant.
The maximum recombination frequency possible between 2 genes is 50%, because when a crossing over happens half the generated gametes will be parental and half will be recombinant.
Final answer:
Out of the 1000 progeny, we would expect around 500 to be recombinant.
Explanation:
To solve this problem, we need to understand the concept of genetic recombination and map units.
Genetic recombination occurs when two linked genes on a chromosome exchange segments during meiosis, resulting in offspring with new combinations of alleles. The frequency of recombination between two genes is measured in map units, also known as centimorgans.
Given that the genes for eye color (Xw) and wing shape (Xm) are 68 map units apart on the X chromosome, we can expect recombination to occur in approximately 68% of the gametes produced during meiosis.
In the mating between the Xw+m+Xwm female and the XwmY male, there are two possible combinations of gametes produced by the female:
Xw+m+: containing the Xw and m+ alleles
Xwm: containing the Xw and Xm alleles
Since the XwmY male only produces one type of gamete (Xwm), all progeny resulting from this mating will have the Xwm genotype.
Now, let's calculate the expected number of recombinant progeny:
Recombinant progeny would result from the combination of the Xw+m+ female gamete (Xw+m+) and the Xwm male gamete (Xwm).
Recombinant progeny would also result from the combination of the Xwm female gamete (Xwm) and the Xw+m+ male gamete (Xw+m+).
Since both combinations involve recombination, we can consider them together.
If we assume equal probability of each type of gamete being produced, we can expect approximately 50% of the progeny to be recombinant.
So, out of the 1000 progeny, we would expect around 500 to be recombinant.
A capsule stain is described as a negative stain because the capsule itself __________. does not take up stain has a negative charge. stains with an acidic dye
Answers
Answer:
Does not take up the stain.
Explanation:
Negative staining refers to the process wherein the unstained specimen is visualized under the darkly stained background.
One of the examples is capsule staining wherein the capsulated cells are stained with India ink or nigrosin dyes. The particles of these dyes stain the background blue-black but cannot enter the capsule.
Hence, the light-colored capsulated cells are visualized in the midst of the blue-black background.
If you are really stressed out about an upcoming math test on Tuesday what type of stress is this? A: avoidance B:acute C:chronic D:conflict
Answers
Final answer:
The stress experienced about an upcoming math test on Tuesday is classified as acute stress (option B), which is short-term and related to specific events.
Explanation:
If you are really stressed out about an upcoming math test on Tuesday, the type of stress this represents is acute stress. Acute stress is characterized by brief focal events that can still feel overwhelming, even after the event has ended. This type of stress pertains to situations that are short-term in nature, contrary to chronic stress, which involves events persisting over an extended period. An upcoming test, therefore, fits the description of an acute stressor because it is a specific, short-lived challenge that triggers stress reactions.
Understanding acute stress is crucial for developing effective coping mechanisms. These strategies might include preparation and study, relaxation techniques, and maintaining a positive outlook to manage the stress of taking the test. Unlike chronic stress, which may require more complex interventions, acute stress situations like a math test typically can be managed with direct action and stress reduction techniques tailored to the situation.
Amino acids, the building blocks of proteins, have the ability to act as buffers in the body. This means that proteins can maintain normal blood pH. By maintaining normal blood pH, the body's proteins are protected from being what?A) NeutralizedB) NaturalizedC) DeneutralizedD) Denatured
Answers
Answer:
The answer to your question is d) Denatured
Explanation:
A) Neutralized this is a chemical process to obtain a salt and water, it doesn't used for proteins. This option is incorrect.
B) Naturalized. Proteins must must naturalized to keep working, when a protein is naturalized it has all its functions. This is not the right option, this question ask us the oposite.
C) Deneutralized This definition is not used for proteins, this option is incorrect.
D) Denatured. Maintaining normal blood pH proteins are protected from being denatured, that means that the lost their function. This is the right answer.
Answer:
Proteins can not be neutralized...naturalized (amino acids are the naturation) and deneutralized. Correct answer is D. Denature can be ocurred if you have extremely changes at specific parameters, ionic force, temperature, solvent polarity and of course, pH.
A fungal spore germinates, giving rise to a mycelium that grows outward into the soil surrounding the site where the spore originally landed. Which of the following accounts for the fungal movement, as described here?
Answers
Answer:
Is a reproductive mycelium
Explanation:
There are two kind of myceliums in a fungi. The structural one, is the responsible to search nutrients and form the structures to continue obtaining nutrients from the soil.
The other kind of mycellium, the reproductive, is the one that surrounds the spores, and when the nutrients gone in a place, the spores can travel far away to search a new place to grow and reproduce.