Answer: He is using Top Down Processing
Explanation:
Top Down Processing is related to how our brains use information that was already in them.
Looking through a light microscope at a cell undergoing division, you see that the condensed chromosomes have lined up along the midline of the cell. The homologous pairs are NOT joined in tetrads. Each chromosome takes its own place in line, independent of its homolog. You are witnessing _____.
Answer:
Mitotic metaphase or metaphase II of meiosis
Explanation:
Metaphase in mitosis and metaphase II of meiosis II include alignment of chromosomes along the equator of the cell with help of spindle apparatus. Here, each chromosome has two sister chromatids.
Metaphase I of meiosis I includes alignment of homologous pairs along the equator of the cell. Since the observed cell have individuals chromosomes aligned along the mid line of the cell, it is metaphase of mitosis or metaphase II of meiosis.
The transcription terminator stops DNA polymerase, AND results in the polymerase falling off the DNA template. adds a terminator nucleotide to the RNA, AND results in a hairpin loop structure in RNA. stops DNA polymerase, AND adds a terminator nucleotide to the RNA. results in a hairpin loop structure in RNA, AND stops DNA polymerase. results in a hairpin loop structure in RNA, AND results in the polymerase falling off the DNA template.
Answer:
Results in a hairpin loop structure in RNA, AND results in the polymerase falling off the DNA template.
Explanation:
As the RNA polymerase arrives at the terminator site, it pauses. The termination of RNA transcription occurs when an RNA transcript with a self-complementary sequence is formed leading to the formation of the hairpin structure. The hairpin structure has 15-20 nucleotides.
The hairpin structure of RNA weakens A=U base pairs in RNA-DNA hybrid and/or weakens the interaction between RNA and RNA polymerase. The overall effect is the dissociation of RNA polymerase from the complex and termination of the transcription.
Which of the following is NOT a source of genetic variation?
A) random fertilization of eggs by sperm
B) independent assortment of chromosomes
C) crossover of homologous chromosomes
D) age of either or both parents
Answer:
The correct answer is option d) age of either or both parents.
Explanation:
Genetic variation is the difference in nucleotide sequences between individuals organisms within a particular population. Variation can occur either in germ cells that are sperm and egg or in somatic cells or in both.
Random fertilization of egg and sperm can lead to genetic variation is every germ cell has a different set of chromosomes. Independent assortment of chromosomes is also the same as random fertilization as it is also random. Crossing over of homologous chromosomes is one of a major source of the genetic variation as it forms a new set of chromosomes.
Thus, the correct answer is option D) age of either or both parents.
Which of the following statements correctly describes what happens to the diaphragm during an inhalation, when the lungs inflate?
A. The diaphragm contracts and flattens.
B. The diaphragm expands.
C. The diaphragm only moves during exhale.
D. The diaphragm returns to its resting state.
A.
When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand.
Answer:
The correct answer is A. During an inhalation, the diaphragm contracts and flattens.
Explanation:
In inhalation (incorporation of air into the body) the diaphragm muscle and the intercostal muscles contract. The diaphragm descends from its position and the intercostal muscles, as a consequence of the posture they adopt, elevate the ribs. When this happens, the volume of the rib cage increases together with the volume of the lungs, and more space is available. As the volume of the lungs rises, the air pressure in them decreases. Product of the pressure difference (now greater in the exterior) the air penetrates quickly through the respiratory tract to the inside of the lungs.
The prairie vole, a small North American grassland rodent, breeds year around, and a group of voles living together consists primarily of an extended family, often including two or more litters. Voles commonly live in large groups from late autumn to winter; from spring through early autumn, however, most voles live in far smaller groups. The seasonal variation in groups size can probably be explained by a seasonal variation in mortality among young voles.Which of the following, if true, provides the strongest support for the explanation above?(A) It is the spring and in the early summer that prairie vole communities generally contain the highest proportion of young voles.(B) Prairie vole populations vary dramatically in size from year to year.(C) The prairie vole subsists primarily on broad-leaved plants that are abundant only in spring.(D) Winters in prairie vole's habitat are often harsh, with temperatures that drop well below freezing.(E) Snakes, a major predator of young prairie voles, are active only from spring through early autumn.
Answer: the correct answer is E. Snakes, a major predator of young prairie voles, are active only from spring through early autumn.
Explanation:
Mortality among young voles from spring to early fall is high because snakes are active during this time.
What happens if you have an extra chromosome?
Answer:
If a person has extra chromosome you or they might have down syndrome
Explanation:
Normally a baby inherits 23 chromosome from each parent which is equal to 46 total and basically those who survive develop down syndrome
The hormones secretin and cholecystokinin target the pancreas, ________, and ________ to release pancreatic juice and bile into the small intestine for digestion.
Answer: stomach + liver
Explanation:
Compare the structures and functions of the biomolecules lipids and starches.
Answer:
Lipids:
Lipids may be defined as the class of organic compounds that are either fatty acids or their derivatives. Lipids mainly composed of a glycerol molecule, long hydrocarbon chains and a phosphate or other chemical group. The main function of lipids are: They acts as energy fuel and acts as a main constituent of plasma membrane.
Starches
Starch may be defined as a type of carbohydrate and present in plants as well as animal. Starch mainly composed of large glucose units linked through the glycosidic bonds. The main function of starch is to provide energy to an organism.
Lipids and starches are biomolecules with different structures and functions. Lipids are nonpolar and hydrophobic, while starch is a type of carbohydrate used for energy storage in plants and animals.
Explanation:Lipids and starches are both types of biomolecules, but they have different structures and functions.
Lipids:Lipids are nonpolar and hydrophobic in nature.They include fats and oils, waxes, phospholipids, and steroids.Fats are a stored form of energy, while phospholipids make up the matrix of cell membranes, and steroids have important functions in the body.Starches:Starch is a polysaccharide, which is a type of carbohydrate.It is used by plants as a storage form of glucose.Glycogen is another storage form of glucose, but it is used by animals.Both starch and glycogen are made up of repeating units of glucose.Learn more about Comparing structures and functions of lipids and starches here:https://brainly.com/question/12906799
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1. One of the results of the new and current naming system is that
the scientist who discovers an organism gets to classify the organism
names are universal
the scientist who discovers an organism gets to decide how long the name for the organism should be
more than one name is used for an organism
Answer:
Names are universal
Explanation:
Current naming system that is followed all over the world is called binomial nomenclature. There are many significant and useful features of this classification system however one of the most important feature is the universality of the name.
The scientific names of organism are usually Latin derived and composed of two parts among which first is genus name and second is specie name.
For example: Rosa indica is the scientific name of Rose and it is same all over the world. Unlike common names we dont have to search for name to make others understand which flower we are talking about because if we know scientific name anyone can understand it.
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Cells undergoing chemotaxis rely on the process of accommodation to keep moving towards higher concentrations of attractants. What protein is directly responsible for modifying the MCP and causing accommodation?
Answer: CheA
Explanation:
Cytokines and chemokines are proteins that bind to other, cells that require specific antibodies to these proteins, making them a form of communication between the system cells immune. That process by which cells are sent to move through a chemical stimulus is called chemotaxis. The internal environment is responsible for the signal transduction part received by the receivers. CheR is a relatively slow enzyme and its main function is to methylate the receptors. It is divided into two domains: one responsible for substrate identification and the other for transferring methyl groups to the receptor.
Answer:
CheR is the protein responsible of for modifying the MCP and causing accommodation. When cells undergo chemotaxis.
Explanation:
Chemotaxis is the movement effect a certain organism suffers after being exposed to chemical stimuli. The organisms that react like this are somatic cells, bacteria, single-cell, or multicellular organisms. Now, when these organisms are in the regulation phase they accept CheR to modify the Mcp or methyl-accepting chemotaxis proteins. The McP is modified because it is needed to regulate the number of proteins required to move and maintaining the number of proteins high but not over administered. Thus, to be capable o performing chemotaxis at its most optimate level at any time.
Vicky is presenting his research on Echinoderms. How should he explain the water vascular system
A)It helps draw water into the siphon
B)It draws water into the tube feet,which help in locomotion
C)It helps expand the body size, which helps in molting
D)It helps the process of filter feeding
Answer:
B
Explanation:
The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet.
It draws water into the tube feet,which help in locomotion,by this way he can explain the water vascular system.
What is meant by vascular system? Circulatory system is an important system in our body whose role is to circulate essential ions, nutrients etc to all the parts of our body. It is also known as the cardiovascular system or vascular system. Different organisms have different kinds of circulatory systems depending on their needs.It draws water into the tube feet,which help in locomotion,by this way he can explain the water vascular system.
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1. What limits do common names have?
They depend on geography.
They often use multiple words.
They are non-descriptive of the organism.
They are descriptive of the organism.
They can be in different languages.
None of the above
Answer:
Explanation:
Common names are local names that are given to organisms. These names are widely and locally accepted even within scientific bodies in order to avoid the rigors of having to use latin names of organisms.
Some of the limits of using common names are:
1. They can depend on geography: some common names are restricted in their use based on their acceptance by set of people. In some other climes, they might not be accepted. This is one big limitation in using common names.
2. They often use multiple words: within a particular area, an organism can be called different names. This is yet another big limitation of common names.
3. They are can be descriptive or non-descriptive of the organism: some common names are descriptive and they can easily tell us about an organism. Others might not even relate to to the organism at all.
4. They can be in different languages: Most languages have a common name for all organisms. This pose a serious scientific barrier when studying such species.
Common names often depend on geography, use multiple words, and can be non-descriptive or overly descriptive. They can also exist in different languages, creating potential confusion.
Explanation:The common names of organisms often have certain limitations. Firstly, they often depend on geography. This means a species might have one common name in one region and another name in a different region. Secondly, they often use multiple words which can complicate their usage. Thirdly, they can be non-descriptive or overly descriptive of the organism. For instance, a 'silverfish' is not a fish, but an insect. Lastly, they can exist in different languages, causing confusion.
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Which two factors below make rapid and substantial blood loss life threatening? loss of immunity and loss of carbon dioxide carrying capacity loss of immunity and loss of blood pressure loss of clotting ability and loss of osmotic pressure loss of blood pressure and loss of oxygen carrying capacity
Answer:
Loss of blood pressure and loss of oxygen carrying capacity
Explanation:
If blood pressure decreases to critical levels the tissue perfusion will be seriously affected. This means that there will be limited nutrients for tissue cells and they will not be able to keep normal functions and will start dying.
If you lose your oxygen carrying capacity tissue cells will not be able to keep aerobic respiration and in a few minutes die.
Rapid and substantial blood loss is life-threatening due to loss of blood pressure and loss of oxygen-carrying capacity. Reduced blood pressure can impair vital organ function, leading to death. The loss of blood also reduces the body's ability to transport oxygen to cells and tissues.
Explanation:The two factors that make rapid and substantial blood loss life-threatening are the loss of blood pressure and the loss of oxygen-carrying capacity. Rapid blood loss leads to reduced blood pressure, which can decrease perfusion to the brain and other vital organs, leading to organ shutdown and death. Simultaneously, the loss of blood also reduces the oxygen-carrying capacity. The human body cannot survive without oxygen for more than a few minutes.
When the oxygen-carrying capacity is decreased due to blood loss, the body's cells and tissues are deprived of the necessary oxygen, impairing their function or causing them to die. Therefore, maintaining both blood pressure and oxygen-carrying capacity is crucial, especially in situations involving significant blood loss.
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If a sample of air contains 1 g/kg of water vapor and has a relative humidity of 25 percent at -5 degrees Celsius how much water vapor does it need to contain to be saturated?
A) 2 g/kg
B) 1 g/kg
C) 4 g/kg
D) 3 g/kg
Answer:
Option C
Explanation:
As we know that
Relative humidity (RH) is defined as the ratio of amount of water vapor present in a given sample of air to the maximum amount of water that can be absorbed by the same sample of air to attain saturation at a particular temperature .
Thus,
[tex]RH = \frac{X}{Y} \\[/tex]
Where X represents the current amount of water vapor present in a given sample of air
and Y represents the maximum amount of water that can be absorbed by the same sample of air to attain saturation at a particular temperature
Substituting the given values in above equation we get -
[tex]0.25 = \frac{1 g/Kg}{Y} \\Y = \frac{1 g/Kg}{0.25} \\Y = 4 g/Kg[/tex]
Hence, option C is the correct answer
In the DNA helix, which part of the nucleotide forms the sides of the ladder, the backbone? A. Pentose sugar and Nitrogen base B. Phosphate group and Carboxylic acid C. Pentose sugar and Phosphate group D. Nitrogen base and Carboxylic acid
Answer:
The response is C. Pentose sugar and Phosphate group
Explanation:
The backbone of the DNA helix is formed by phosphate groups and sugars that are connected by phosphodiester bonds. The four (4) nitrogen bases are localized in the center of the DNA helix, where Adenine pairs with guanine, and thymine with cytosine
Which of the following is responsible for the overall integration of the autonomic nervous system (ANS)? Which of the following is responsible for the overall integration of the autonomic nervous system (ANS)? brain stem hypothalamus frontal lobe of the cerebral cortex reticular formation
Final answer:
The hypothalamus is responsible for the integration of the autonomic nervous system, balancing the sympathetic and parasympathetic systems to maintain homeostasis.
Explanation:
The hypothalamus is responsible for the overall integration of the autonomic nervous system (ANS). As the control center for many homeostatic mechanisms, it plays a crucial role in regulating both autonomic and endocrine functions. This includes tasks such as adjusting the balance between the sympathetic and parasympathetic systems to maintain homeostasis within the body. The hypothalamus receives sensory information and higher cognitive input, which it uses to coordinate sympathetic and parasympathetic efferent pathways, thus regulating the activities of various organ systems.
Tall pea plants are dominant over short pea plants. If there are 200 short plants in the F2 generation from a cross that followed Mendel's methods, about how many plants will be tall in that generation?
Answer:When two true breeding plants breed they produce an F1 generation. The genotype for the true breeding parents would be TT and tt. Each of the offspring in the F1 generation would have the genotype of Tt and would have the phenotype of being tall, since tall is dominant. Next, we breed the plants of the F1 generation to produce the F2 generation. We know that the phenotype of the parents are both Tt. From this you can create a punnet square:
T t
T TT Tt
t Tt tt
Explanation:TT is expressed as tall
Tt is expressed as tall
tt is expressed as short
The punnet square shows you that 75% would be tall and 25% would be short.
The 200 short plants in the questions would be 25% of 800. Take the 200 away from 800 and you get approximately 600 that would be tall.
Answer:
600 tall plants.
Explanation:
Tall pea plants is dominant over short pea plants. The short pea plants has genotype tt. Tall pea plants can genotype either TT or Tt.
According to mendel's cross the cross between TT × tt will result in the following genotype.
T TT Tt
t Tt tt
The cross clearly indicates that 25% plant will be short and 75% plant will be tall. 25% plant is short out of 800. So, the remaining 600 plants will be tall.
Thus, 600 plants will be tall in the generation.
What structure in skeletal muscle cells functions in calcium storage?
Answer:
Sarcoplastic reticulum
Explanation:
The sarcoplastic reticulum is a structure found in muscle cells that stores calcium ions in skeletal muscles. They are made up of a network of smooth endoplasmic reticul (SER), that wrap around the myofibrils and help in transmitting electrical impulses that will determine whether the muscle will contract or not.
The structure in skeletal muscle cells that functions in calcium storage is the sarcoplasmic reticulum. This specialized smooth endoplasmic reticulum stores, releases, and retrieves calcium ions necessary for muscle contraction.
Explanation:In the skeletal muscle cells, the structure that functions in calcium storage is known as the sarcoplasmic reticulum. This is a specialized smooth endoplasmic reticulum that is responsible for storing, releasing, and retrieving calcium ions. The calcium ions stored in the sarcoplasmic reticulum are crucial for the process of muscle contraction.
The calcium ions get released from the sarcoplasmic reticulum to the cytoplasm, referred to as sarcoplasm, where they bind to proteins that regulate the process of contraction and relaxation of muscle fibers. After the muscle contraction process is completed, ATP-dependent calcium pumps actively transport calcium ions back into the sarcoplasmic reticulum for storage and out of the cell.
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Parland’s alligator population has been declining in recent years, primarily because of hunting. Alligators prey heavily on a species of freshwater fish that is highly valued as food by Parlanders, who had hoped that the decline in the alligator population would lead to an increase in the numbers of these fish available for human consumption. Yet the population of this fish species has also declined, even though the annual number caught for human consumption has not increased.
Which of the following, if true, most helps to explain the decline in the population of the fish species?
(A) The decline in the alligator population has meant that fishers can work in some parts of lakes and rivers that were formerly too dangerous.
(B) Over the last few years, Parland’s commercial fishing enterprises have increased the number of fishing boats they use.
(C) The main predator of these fish is another species of fish on which alligators also prey.
(D) Many Parlanders who hunt alligators do so because of the high market price of alligator skins, not because of the threat alligators pose to the fish population.
(E) In several neighboring countries through which Parland’s rivers also flow, alligators are at risk of extinction as a result of extensive hunting.
Answer:
(C) The main predator of these fish is another species of fish on which alligators also prey.
Explanation:
The ecosystems are complex systems, and removing one species of them, always has a chain reaction and affects the population of the other species, be it in a positive or negative manner. In this case, the alligators prey upon fish, multiple different species. The alligators though have been removed from the ecosystem, thus the apex predator exists no more. This has opened up the top predator niche in the food chain in this particular ecosystem. The predatory fish species had no predators of its own, so its population increased, thus it needed more food, and that food was obtained by hunting the other fish species, resulting in a decline in the population of the other species of fish. Only when the carrying capacity is reached in the ecosystem for the predatory fish, the population of the other fish will stop declining.
Where in a sarcomere do you find titin and tropomyosin
Answer:
The titin in the sarcomere extends from the Z-line. The tropomyosin along with troponin binds inside the grooves between actin filament.
Explanation:
The sarcomere is the unit of muscle tissue. The titin protein is very large and extends from the sarcomere. The titin binds to the thick filaments and it provides the elasticity.
The tropomyosin protein binds to the another protein, troponin. This complex help in contraction of muscles. The calcium binds to the troponin complex and thereby activating it and allow contraction of muscles.
Scientists in different parts of the world study the path and speed of a newly discovered comet. If the results of the studies are identical, they would most likely be
Answer:
Reliable
Explanation:
The term reliability refers to the findings of the study or the results being replicated more than once.
Answer:
The correct answer would be - Valid or reliable.
Explanation:
The validity or reliability of a study is a measure of an experiment or studies that helps in to check or test if a study is correct or not. It helps in the determination of the study method and explanation of the phenomena of particular study.
The reliability or validity of a study can be established by same results or conclusions by repeating the study or experiment every time.
Thus, the correct answer is - valid or reliable.
Which of these is a way climate change positively affects organisms?
A. Reduces current food supply
B. Provides new habitat
C. Reduces habitat area
D. Increases ocean acidity
Answer:
Climate change positively affects organisms by providing them new habitat.
Explanation:
Climate change induces changes in various parameters of an ecosystem like temperature, precipitation, soil properties etc. habitats may undergo changes that make it unsuitable for native organisms to live in.
But this new conditions may be favourable for some other kind of organisms to thrive and flourish.
For example, when temperature of a lake increases due to climate change warm water aquatic organisms find a new habitat in the lake. But this threatens the life of native cold water organisms of the lake.
Thus climate change doesn’t bring any benefits to living world without harming one or the other group of organisms.
Answer:
Explanation:Climate change positively affects organisms by providing them new habitat. Explanation:Climate change induces changes in various parameters ...
What would most likely happen if green plants were exposed to longer days of sunlight?
A. The vacuoles would quickly shrink.
B. The mitochondria would produce less energy.
C. The chloroplasts would produce more energy.
D. The cell wall would become thicker.
(It's for APEX, help me pls)
Answer:
The Chloroplasts would create more energy
Explanation:
If green plants were exposed to longer days of sunlight, the chloroplast would produce more energy. Thus, the correct option is C.
Why sunlight is required for plants?The sunlight is required for plants to initiate the process of photosynthesis. Through this method, green plants synthesize their own food with the help of carbon dioxide and water.
When green plants were exposed to longer days of sunlight, they perform the process of photosynthesis through which chloroplast synthesize glucose that delivers more energy to the plants.
Therefore, the correct option for this question is C.
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A strand of DNA contains the bases adenine, cytosine, cytosine, and guanine, in that order. What would be the order of the bases on the complementary strand of DNA?
Answer: Complementary strand of DNA will be thymine, Guanine,Guanine and cytosine.
Explanation: This is a process called DNA transcription, where DNA makes exact copies of itself during gene expression. DNA unwinds and parent DNA strand will make exact copies of itself resulting in two daughter strands. Complementary base pairs will be formed in a way that adenine pairs with thymine and guanine pairs with cytosine. This reaction is catalysed by DNA polymerase enzyme.
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According to the cladogram shown, which two animal species shared the most recent common ancestor?
A. Primates and crocodiles
B. Birds and rodents
C. Sharks and birds
D. Birds and crocodiles
Answer:
The answer is D. Birds and crocodiles
Explanation:
They both share the same point which is their characteristic
A client was hospitalized after a family member filed a petition for involuntary hospitalization for safety reasons. The family member seeks out the nurse because the client is angry and refuses to talk. The family member states, “I feel so guilty about my decision.” Which response by the nurse is the most empathic?
Answer:
"It is common for family members to feel this way. Can you tell me more?"
It ensures the family member to be calm and to know that she is not guilty
In primary production ________. oxygen utilized by animals is less than the oxygen consumed by autotrophs proteins are made by animals carbon dioxide is released into the water oxygen is utilized by plants there is a net gain in organic carbon by organisms
Answer:
There is a net gain in organic carbon by organisms
Explanation:
Primary production refers to the total biomass produced by producers. It mainly includes the organic matter produced by the photosynthetic activity of green plants using the energy of sunlight. Since the process of primary production includes the production of organic matter, the organic matter present in living beings is increased.
smoking increases ____ levels in the blood, thus increasing the possibility of unwanted clotting.
Answer:
Increases homocysteine levels
Explanation:
Homocysteine is an aminoacid that is resent in our blood already. This is mostly increased in our blood due to increased consumption of meat and other potential reasons, such as smoking.
High level of this aminoacid are linked to the development of heart diseases. This is because a high homocysteine level causes development of heart diseases along with other risks of renerl diseases.
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Answer:
Glucose Levels
Explanation:
A collection of closely related animals or plants that share a similar genetic evolutionary history but cannot necessarily interbreed to produce fertile offspring is referred to as a _____. species genus tetraploid polyploid diploid
Answer:
Genus
Explanation:
Genus is a group of related plant or animal species. These group of species share a common evolutionary history which means that they are descended from a recent or distant common ancestor. These group of plant or animal species can not interbreed among themselves as the individuals of the different species can not interbreed to give rise to the fertile progeny.
Example: Solanum is a plant genus that includes many species such as nigrum, tuberosum, etc. The plants of S. nigrum and S. tuberosum can not interbreed in nature as they belong to different species.
During which phase of mitosis do the chromosomes line up on a plane equidistant from the two spindle poles?
Answer: Metaphase; chromosomes line up at the metaphase plate equidistant from the two spindle poles.
During metaphase of mitosis, chromosomes line up in the middle of the cell's two poles on a plane called the metaphase plate. At this stage, the chromosomes are at their peak condensation and sister chromatids are still closely bonded. Ready for the next phase, the microtubules plan to separate these chromatids, pulling each to opposite cell poles.
Explanation:The phase of mitosis during which the chromosomes line up on a plane equidistant from the two spindle poles is called metaphase. Here, all of the chromosomes align on a plane named the metaphase plate, or equatorial plane, which is situated midway between cell's two poles. During metaphase, sister chromatids are still closely attached to each other by means of cohesin proteins. This stage also marks the point when the chromosomes reach their highest level of condensation.
Following this stage, the microtubules are prepared to pull these sister chromatids apart, moving one of each pair to opposing sides of the cell. This orderly process ensures that each daughter cell would receive an exact replication of the cell's DNA.
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