When they write up their initial proposal, the instructor will probably state that the cannot compare a shepherd-mix dog with a bulldog. Since they are different races, the diet is not representative of the feature they want to measure.
In order to compare which diet results in bigger, healthier and faster growing dogs, they should have the same dog.
Biosynthesis of many molecules in cells, and many modifications of macromolecules like proteins, RNA, and DNA require addition of single carbons. What is/are the major carrier/s of single carbons in cells?
a) S-adenosylmethionine
b) Acetyl CoA
c) Tetrahydrofolate
d) a and b
e) a and c
Answer:
The correct answer is option e) "a and c".
Explanation:
Single carbons are atoms needed for the biosynthesis of many molecules in cells, therefore the cells need a pathway to move group of atoms containing single carbons to make them available for the biosynthesis. S-adenosylmethionine and Tetrahydrofolate are two of the major carriers of single carbons in cells. S-adenosylmethionine (SAM) acts as a methyl (-CH3) donor and Tetrahydrofolate (THF) as a cofactor in enzymatic reactions.
A population _____ follows a period of _____.
A. increase; overshoot
B. decline; overshoot
C. scarcity; dieback
I believe it to be B!
Answer:
Decline Overshoot
Explanation:
Odyseyware
18. Of what are phospholipids important components?
A.the double bond in hydrocarbon chains
B.the plasma membrane of animal cells
C.the ring structure of steroids
D.the waxy covering on leaves
Phospholipids are vital components of the plasma membrane of animal cells. They formulate a lipid bilayer which controls transportation of substances across the membrane.
Explanation:Phospholipids are important components of the plasma membrane of animal cells. Phospholipids form a lipid bilayer, which is the basic structure of a cell membrane. This bilayer is semi-permeable and allows the transportation of specific substances across the cell membrane. The structure of phospholipids, with a hydrophilic (water-loving) head and two hydrophobic (water-fearing) tails, make them optimal for this role in cell biology. An example of a cell-regulation process involving phospholipids is the transportation of ions and small molecules across the membrane.
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QUESTION 2
To neutralize gastric juices in your stomach, antacids contain ____.
A)bases
B)H+ ions
C)hydronium ions
D)phenolphthalein
To neutralize gastric juices in your stomach, antacids contain bases.
So A is the answer.
Answer:
To neutralize gastric juices in your stomach, antacids contain bases. Is the answer is option A.
Explanation:
The presence of hydrochloric acid inside the stomach makes the food very acidic and sometimes it is also considered to be as acidity in stomach. It can utilize this acidity of the food bases are required from outside of the body. For this work antacids are the best option to be used.
In antacid there is a presence of base which is helpful for making the acidic food neutralize for the further process. Milk of magnesia is very common example of antacid.
Mendel’s Principle of Segregation states that the alleles of a gene will separate from one another during the formation of gametes. Consider the genotype Aa. How many different types of gametes will this individual produce?
Answer:
Two
Explanation:
When alleles pass through segregation hey get ripped apart from it's homologous to produce mono allele gametes.
To create a new organism, that mono allele gamete will associate with another mono allele gamete to greate a full cell.
In this case, if your complete cell has both alleles A, and a.
Could produce two single allele cells A or a.
An individual with genotype Aa will produce two types of gametes according to Mendel's Principle of Segregation. They are either 'A' or 'a', each representing one allele of the gene.
Explanation:According to Mendel’s Principle of Segregation, genotype Aa will make two different types of gametes during sexual reproduction.
These gametes have one of each allele for the gene, because the alleles separate during meiosis, the process that forms gametes. So, an individual with the Aa genotype will produce two types of gametes: one with the 'A' allele and one with the 'a' allele. This is due to the independent segregation of alleles for each gene during gamete formation.
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Five mass extinctions have occurred throughout Earth's history, the last hypothesized to have been caused by an asteroid impact at the end of the Cretaceous. Currently, scientists agree that we are in the middle of a sixth mass extinction. What is the cause of the current mass extinction?
Answer:
The cause of the current mass extinction is the anthropic activity. The consumption of fossil fuels, ocean acidification, pollution, deforestation and forced migration threaten life and have caused the disappearance of many species.
Final answer:
The sixth mass extinction differs from past events as it is caused by human actions, including habitat destruction, pollution, and overexploitation of species, marking a significant shift from natural catastrophic events to anthropogenic impacts.
Explanation:
The cause of the current, or sixth mass extinction, is significantly different from those of the past. While past extinctions were largely due to major geologic and climatic events, the sixth extinction is directly attributable to human actions. These actions include habitat destruction, overexploitation of species, pollution, and the introduction of invasive species, all of which have dramatically increased the rate of species extinction.
Unlike previous mass extinctions that were caused by events such as asteroid impacts or massive volcanic eruptions, the current crisis is the result of the activities of Homo sapiens, especially since the onset of the industrial revolution.
Which factor is not a characteristic of a mineral? a variable chemical composition crystalline structure that forms a geometric shape naturally occurring, inorganic substance always a solid; never a liquid or a gas
Answer:
A, a variable chemical composition
Explanation:
K12 Test this was the answer here
A variable chemical composition is not a characteristic of a mineral, which has a pre-established chemical composition and currently has a crystal structure.
Minerals are natural substances of inorganic origin, generally solid, that have a defined chemical composition.
Some of its characteristics are:
It is found in nature, that is, it is not manufactured.It has a fixed geometric structure, therefore it is solid.It is inorganic in nature.It has a fixed chemical composition, although, at times, it may contain a polluting substance that modifies its color.Luster, hardness and toughness are some of its properties.Therefore, we can conclude that a variable chemical composition is not a characteristic of a mineral.
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Body posture is best described as ___________.
a. a characteristic way of bearing one’s body
b. clothing and accessory decisions that individuals choose to accent their body features
c. human movement that is used to communicate messages between people
d. the way in which individuals try to present their body type
Answer:
The correct answer is c. human movement that is used to communicate messages between people.
Explanation:
Body posture comes under non-verbal communication. Most of the time people communicate non-verbally than verbally by facial expression, body posture, appearance, and gesture.
Body posture says a lot of things about a person like if a person's body posture is straight that shows that the person is focused, interested and confident but if a person has stooped posture while sitting or standing gives a message that the person is bored and lack self-confidence.
Body posture also affects the health and personality of any individual. Day to day lifestyle of modern life is hugely responsible for people's bad body posture and health issues.
Therefore, the correct answer is c. human movement that is used to communicate messages between people.
A 1cm diameter, 6 cm long core is removed from a carrot. The resulting hole is filled with corn syrup, and a glass tube is inserted into the hole to make a watertight seal. The carrot is suspended in a cup of pure water. Beginning with the carrot cells adjoining the hole, and going out to the carrot epidermal cells exposed to the water, describe what will happen to the carrot cells. Also, what will happen to the level of liquid in the glass tube and why?
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[tex]\boxed{Explained\:Answer}[/tex]______________________________
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■Here,The corn syrup is hypertonic to the carrot, so will take water from the adjoining cells, causing those cells to shrink, become hypertonic to their neighboring cells and to take water from them.
■Conversely the water is hypotonic, and will enter the cells in the outer of the carrot.
■Because of this water will pass from the outside of the carrot to the inside, and cause liquid in the tube to rise
Answer:
Carrot cell will swell and liquid level in glass will reduce
Explanation:
Carrot cell will absorb water and swell in due course of time as there is difference in concentration of water outside and inside the cell.
Similarly, the corn syrup remains intact from the epidermal cell of the carrot due to the glass tube. Being hyper-tonic in nature and also due to presence of water tight glass lid, it is unable to extract water from the adjoining cell; corn syrup will take water from the tube thereby further reducing the level of water in the tube
What is the composition of the most common mineral compounds that make up Earth's crust and mantle? sulfates, oxygen, and one or more nonmetal elements carbonates, hydrogen, and one or more organic compounds silicon, oxygen, and one or more metal elements oxalates, oxygen, and one or more organic compounds
Answer:
silicon, oxygen, and one or more metal elements
Explanation:
The answer is Silicon, Oxygen, and one or more metal elements!! I took the test and got this answer right!
Active transport must function continuously because __________.a) plasma membranes wear outb) cells must be in constant motionc) facilitated transport opposes active transportd) diffusion is constantly moving the solutes in the other direction
Answer: Option D.
Explanation:
Active transport is defined as the transfer of molecules and other substances across a membrane from lower to higher concentration against the concentration gradient. Active transport utilizes Adenosine Triphosphate (ATP) as a energy source for the continuous movement of molecule against its concentration gradient.
Active transport function continuously because constant process of diffusion allows the movement of solutes in other direction.
For example cells are having higher concentrations of potassium (K+) and lower concentrations of sodium (Na+) in comparison to extracellular fluid. concentration gradient supports diffusion of Na+ ion into the cells and diffusion of K+ out of the cell. In such manner other small substances like glucose and amino acid constantly move across the plasma membranes and maintains concentrations of ions and other substances required for the body.
Hence, the correct option D.
The dog family is Canidae. Some well-known members of the dog family are the domestic dog, Canis familiaris; the coyote, Canis latrans; and the red fox, Vulpes fulva. If this classification represents phylogenetic relationships among the three species, we can conclude that the people who gave these animals these names concluded that __________.
a. domestic dogs evolved from coyotesb. domestic dogs and coyotes have a different ecological niche than foxesc. the common ancestor of coyotes and domestic dogs is more recent than the common ancestor of foxes and domestic dogsd. foxes are more closely related to dogs than they are to coyotes
Answer:
The correct answer is c. the common ancestor of coyotes and domestic dogs is more recent than the common ancestor of foxes and domestic dogs
Explanation:
The Canidae family includes foxes, wolves, coyotes, jackals, foxes, and domestic dogs. Both dogs and coyotes are evolved from ancient wolves and all three can interbreed to produce hybrids.
Dogs are evolved from gray wolves and then domesticated by humans. Humans did the selective breeding of dogs which resulted in artificial evolution of dogs.
Coyotes are evolved from eucyon which was a primitive wolf. Most scientists believe that C. lepophagus is the ancestor of wolves, coyotes, and dogs. Red fox can not interbreed with dogs, coyotes, and wolves that shows that it does not share a more recent ancestor with these three.
Therefore, the correct answer is c.
Which of the following correctly matches the equilibrium receptor organs to the type of equilibrium it monitors?
a. maculae/dynamic
b. equilibrium maculae/static
c. equilibrium crista ampullaris/static
d. equilibrium saccule/dynamic equilibrium
Final answer:
The correct match for the equilibrium receptor organs to the type of equilibrium they monitor is maculae/dynamic. The maculae monitor dynamic equilibrium, while the crista ampullaris monitors static equilibrium. Option a is the correct match.
Explanation:
The correct match for the equilibrium receptor organs to the type of equilibrium they monitor is:
The maculae are receptor organs within the utricle and saccule that monitor dynamic equilibrium, which is the sense of linear acceleration and tilting of the head. The crista ampullaris within the semicircular canals monitors static equilibrium, which is the sense of head movement and rotation. Therefore, option a is the correct match.
How do changes in nutrient levels affect the structure of aquatic food webs?
ANSWER:
The effects of increasing or decreasing the nutrient levels in an aquatic food webs is described in the explanation.
Explanation:
If the nutrient levels in an aquatic food web increase moderately then it will result in increased production of the primary producers and the consumers.
But if the nutrient levels are increased excessively, like in eutrophication, then the increased level of nutrients will result in overproduction of the consumers like fishes, etc. Hence, there will be a scarcity of resources like oxygen in the water to support them and this will lead to a decline in biodiversity of the aquatic food web.
If the nutrient levels are decreased, then there will be competition for resources among the species which will ultimately lead to the decline of some species from the aquatic food web.
which of the following statements is true about the normal functioning of an enzyme? A. The substrate can bind in any location on the enzyme. B. Enzymes store molecules for later use. C. Temperature effects the activity of an enzyme. D. Enzymes can be used with any substrate.
Among the given options, only 'Temperature effects the activity of an enzyme' is true about the normal functioning of an enzyme. An enzyme cannot bind with just any substrate or store molecules. Such molecules have active sites for specific substrates, which according to 'lock-and-key' or 'induced fit' models, aid in biochemical reactions.
Explanation:The correct statement about the normal functioning of an enzyme is 'C. Temperature effects the activity of an enzyme'. Enzyme molecules possess a unique region known as the active site to which they bind with a specific substrate, adhering to lock-and-key or induced fit hypothesis models. This explains why enzymes cannot be used with any substrate, refuting options A and D.
Moreover, enzymes do not store molecules; they aide in various biochemical reactions. The activity of an enzyme can indeed be influenced by temperature; they optimally work within a certain temperature range. High temperatures can lead to denaturation of enzymes, affecting their shape and functionality. Therefore, statement C is the correct one.
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When selecting the proper microscope to view a sample, you should choose a/an ___________ microscope to look at a fresh lung tissue (whole organ) a/an __________ microscope to observe the patterns of cells on a slide, and a/an __________ microscope to study individual organelles within cells in great detail.Select one:a. compound, electron, dissectingb. dissecting, compound, electronc. electron, dissecting, compoundd. dissecting, electron, compounde. electron, compound, dissecting
Answer:
The correct answer is option B. Dissecting, compound, and electron.
Explanation:
Dissecting microscopes are used to study the surface of the individual specimen. It is a stereoscopic microscope that means it has two distinct lenses to provide two different images to get three-dimensional details.
Compound microscopes are the instruments that magnify the image of a small object. It magnifies the image at two stages by the objective lens and an eyepiece. Magnification of these is higher than normal or stereo microscopes.
Electron microscopes are a microscope that uses an accelerated electron beam to reflect an image of the specimen by bouncing off the surface of the specimen. It is used to study the comprehensive structure of the specimen.
Thus, the correct answer is - b.
In the anatomical position, the body is standing erect with the feet flat on the floor, face and eyes facing forward, and arms at the sides with the palms facing forward. Which of the following best describes the anatomical position? Select one:
A. Right and left are reversed.
B. Toes and palms are anterior.
C. Toes and palms are posterior.
D. The head is inferior to the abdomen.
E. The transverse plane divides the body into right and left portions.
Answer:
B. Toes and palms are anterior.
Explanation:
In an anatomical position, directional terms are used to describe the position of the body parts with respect to each other. Anterior, also referred to as ventral position, means the specific body part is at the front of the body or facing forward.
According to the given position of the standing body, palms are facing forward making them anterior in position. The body is standing on the floor with flat feet which means that the toes of the feet are also facing forward.
This makes both toes and palms of the given standing body to be anterior in their position.
In the anatomical position, the body is upright with eyes facing forward and arms at the sides, palms and feet facing forward. In this stance, it is accurate to say that the toes and palms are anterior (facing to the front of the body), not posterior (facing toward the back of the body).
Explanation:In the anatomical position, the body is positioned in the upright posture with the feet flat on the floor. The face and eyes facing forward and arms are positioned at the sides, with palms turned so they are facing forward as well. In this stance, it is most accurate to say that the toes and palms are anterior (B).
Anterior refers to the front of the body or positioned nearer to the head. Therefore, when standing in anatomical position, the palms and toes are indeed anterior, as they are oriented toward the front. The term posterior, on the other hand, refers to the back of the body or something further away from the head. So, in anatomical position, the palms and toes are not posterior.
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Which joint in the human body has the widest range of movement?
Ball and Socket Joint
This type of joint allows for a wide range of rotation and movement. The shoulder and hip are ball and socket joints.
The ball-and-socket joint, such as the hip and shoulder joints, enables the widest range of movement in the human body.
Ball-and-Socket Joint: The joint with the greatest range of motion is the ball-and-socket joint. For example, the hip joint and the glenohumeral (shoulder) joint are ball-and-socket joints that allow extensive movement in different directions.
Darwin studied actual birds on the Galapagos
Islands instead of using a simulation, as you did in
this lab. Studying natural selection in the field can
be challenging. List at least three possible
challenges Darwin might have faced.
Answer:
Natural selection was proposed by Darwin.
Explanation:
He stated that when the limiting factor exist then different species of organism have to compete with each other and the species that is able to survive the competition stays and adapt themselves according to the condition.
Darwin studies natural selection in birds of Galapagos island. He must have faced difficulties and they are: complex environment is difficult to study, it may take longer to study different generations of a population and the birds may be dependent on other species that also might have evolved.
What are the atoms that make up carbohydrates
Answer:
All carbohydrates, including sugar, contain the same three elements: carbon, hydrogen and oxygen. Different arrangements of these elements form single units to make different types of carbohydrates.
Carbon and hydrogen
Cells of a normally rod-shaped bacterium (e.g., Bacillus subtilis) that have completely lost the ability to produce the MreB protein would mostly likely be
Answer:
The bacterium will be a spherical shape
Explanation:
The responsible for the width of rod-shaped bacteria is the protein called MreB. This protein forms large microfilaments that are very similar to actin filaments found in eukaryotic cells. All the bacteria that are spherical by nature doesn’t have the protein MreB. So, if a rod-shape bacterium that doesn´t have a MreB protein or is altered this bacterium would be spherical-shape.
Photosynthesis is made up of both light-dependent and light-independent reactions. Identify the products of the light-dependent portion of photosynthesis. ADP, NADP+, and glucose ATP, NADPH, and oxygen NADP+, oxygen, and glucose Carbon dioxide, water, and ATP
The products of the light-dependent reactions in photosynthesis are ATP (adenosine triphosphate), NADPH (nicotinamide adenine dinucleotide phosphate), and oxygen. These components are created by converting absorbed solar energy into chemical energy, which are then used to fuel further reactions in photosynthesis.
Explanation:Photosynthesis, fundamental to life on Earth, occurs in two primary stages: the light-dependent reactions and the light-independent reactions (also known as the Calvin Cycle). The question pertains to the products of the light-dependent reactions.
During the light-dependent reactions, energy from sunlight is absorbed by chlorophyll within the photosynthetic membranes. This process essentially converts light energy into chemical energy. This takes form as ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate), often considered 'energy carriers'. Additionally, the light-dependent reactions also result in the creation of oxygen, a byproduct formed when water molecules are split to provide the electrons for photosynthesis.
Therefore, the correct answer is: ATP, NADPH, and Oxygen. These molecules then provide energy for the light-independent reactions (Calvin Cycle), which lead to the production of glucose, a form of usable energy for plants.
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Phospholipids tend to group together so that their polar parts face the surrounding aqueous environment, while their hydrophobic tails face each other. The resulting structures are called _______.
Multiple Choice
a. steroids
b. micelles
c. ketones
d. round cells
Answer: b. micelles
Explanation:
Phospholipids are lipids that contain a polar part, which is hydrophilic (i.e. likes water) and a non-polar part, which is hydrophobic (i.e. dislikes water).
When phospholipids are in an aqueous environment they form a structure called micelle, in which the polar heads face the water molecules and surround the non-polar tails which remain on the inside. This way, the polar heads protect the hydrophobic chains from exposure to the aqueous environment.
I've attached an image of a micelle for better understanding of its structure.
A red blood cell placed in a hypertonic solution will shrink in a process called crenation. A red blood cell placed in a hypotonic solution will swell and potentially burst in a process called hemolysis.
True / False.
Answer:
True
Explanation:
This process is called Chemiosmotic Theory.
Two different solutions with a semi-permeable barrier (it allows to pass throw just water or solute, not both) will try to get into equilibrium.
Then, if you allows to pass just water though the barrier, it will go from the solution with less solute to the solution with more solute, in order to reach the solution equilibrium.
A chef sprays antimicrobial cleaner on her counter top. At first the bacterial population declines significantly. However, even though she continues to spray in the following weeks, the number of bacteria begins to increase again. Why did this happen?
Answer:
Bacteria resistance
Explanation:
The antimicrobial cleaner contained certain product which most bacteria living on the counter top were sensitive to. This means, the product was effective and killed most of them. This is why the population declines significantly.
Yet, a few bacteria were already resistant to this product. This happens because of variability in their genome. Some bacteria have mutations in their DNA that confers them this advantage, by chance.
This few resistant bacteria will slowly start to grow again, while the chef continues to spray them, and therefore keeps selecting the resistant ones allowing their population to increase again.
Which of the following substances contained the most catalase?
Question 1 options:
A.Chalk
B.Potato
C.Leaves
D.Liver
Answer: B. Potato
Explanation:
The catalase is an enzyme which can be seen in all living organisms which are exposed to the action of oxygen. It's function is to catalyze the decomposition of hydrogen peroxide into water and oxygen. This enzyme is protective against the oxidative damage caused to the cells of the organisms.
The large concentration of catalase can be seen in potatoes.
Which of these is not a component of a molecule of adenosine triphosphate (ATP)?
adenosine
phosphate
deoxyribose sugar
ribose sugar
Answer: The right answer is Deoxyribose sugar
Explanation:
ATP consists of adenosine (this is an adenine ring and a ribose sugar) – and three phosphate groups (triphosphate).
Hope this helps
Final answer:
Deoxyribose sugar is not a component of ATP; instead, ATP contains adenosine (adenine and ribose sugar) and three phosphate groups.
Explanation:
The component that is not a part of an adenosine triphosphate (ATP) molecule is deoxyribose sugar. ATP is composed of adenosine, which consists of adenine and ribose sugar, and three phosphate groups. Deoxyribose sugar is found in DNA, not ATP. The ribose sugar in ATP is a five-carbon sugar that is crucial for the molecule's structure and function, particularly in storing and transferring energy within the cell.
Susan wants to see how different chemicals in the soil affect plant growth. Therefore, she gets all of the same type of plant, sets them up in the same place, waters them the same amount, but then puts different chemicals on each of them. What is the independent variable in Susan's experiment?
The chemicals
The plant growth
The amount of water
Where she set-up the plants
Answer:
The chemicals
Explanation:
When a scientific experiment is proposed, it is necessary that the dependent and independent variables are identified.
An independent variable is one that does not need the influence of another variable and is responsible for presenting a result that depends on its manipulation. The dependent variable, on the other hand, is one that is influenced by the dependent variable and needs its manipulation to generate a result.
In the question above, we saw that Susan wants to know what results the manipulation of different chemicals will have on plant growth. With that, we can say that chemicals are the independent variable, while plant growth is the dependent variable.
Why are plants in the alpine biome typically low growing? a. They have limited access to nutrients. b. They have limited access to sunlight. c. They have too much access to water. d. The have access to nutrient-rich soil. Please select the best answer from the choices provided A B C D
Answer:
B. They have limited access to nutrients.
Explanation:
Although different factors affect plant growth at high altitudes such us, higher U.V radiation, temperature and harsh winds. Depending on its location alpine biome has shallow soils that cannot support the growth of big trees. Another factor could be the run off caused by rain which ends up washing top soil nutrients limiting its availability and hence plant growth.
Also cold temperatures slow down decomposition procees limiting nutrients.
Plants in the alpine biome are typically low growing because they have limited access to sunlight.
Answer: B. They have limited access to sunlight.
Explanation:
Alpine biomes are described by cool temperatures, plentiful breeze and moderately low precipitation. This biome is home to just around 200 plant species, as their dynamic conditions are not good for plant development.
These areas are described by cold and blustery conditions as well as harsh daylight. Additionally, there's an insignificant stock of carbon dioxide for photosynthesis at high elevations.
For instance - The Himalayas, The Scottish Highlands, The Caucasus Mountains have alpine biome.
what is artifical selection
Answer:
Intentional reproduction between two individuals
Answer: What situation is an example of artifical selection?
A) Female bluegill fish prefer to lay their eggs in the nests of larger male fish.
B) Albino deer or rabbits have a low survival rate in nature, because it is easy for predators to spot them.
C) Penguins with higher body fat tend to survive nesting in the Antarctic winter, while leaner penguins often die.
D) More African elephants today naturally lack tusks compared to the elephant populations 100 years ago, because big game hunters sought elephants for ivory.
Explanation:
Here is the options, please help !!!