An independent variable is the factor that is purposely manipulated in an experiment to investigate its impact on the dependent variable. The correct answer to the student's question is A. a variable that is purposefully changed in an experiment.
Explanation:An independent variable is a variable that is purposefully changed or manipulated in an experiment. It's the factor the experimenter chooses to vary to observe the effect this variation has on the dependent variable. For example, if a scientist hypothesizes that fertilizer amount affects plant growth, the independent variable is the quantity of fertilizer applied. During a well-designed experimental study, the independent variable is the only significant factor altered between the experimental and control groups. The experimental group receives the intervention or treatment that includes the independent variable, while the control group does not receive the experimental manipulation. Therefore, the correct answer to the question 'What is an independent variable?' is A. a variable that is purposefully changed in an experiment.
If the human population continues to grow, what is a likely effect on land use?
A. More land will be used for forests.
B. More land will be used for grasslands.
C. More land will be used for wetlands.
D. More land will be used for agriculture.
The correct answer is - D. More land will be used for agriculture.
If the human population continues to grow, than that means that there will be more mouths to feed in the world, so a larger amount of food will be needed so that malnutrition and starvation are avoided. To have more food, the agriculture will have to produce more, and for producing more it needs more land for production, thus more land will be used for agricultural production.
Final answer:
If the human population continues to grow, a likely effect on land use is that more land will be used for agriculture.
Explanation:
If the human population continues to grow, a likely effect on land use is that more land will be used for agriculture. As the population increases, the demand for food also increases, leading to the expansion of agricultural activities. This can result in deforestation and conversion of natural habitats into farmlands.
One strand of dna is 5' - aggcctta - 3'. what is the opposite strand?
the is found at 0 Longitude
Review the phases of the cell cycle in model 1 by placing the abbreviated phase name (g1 , s, g2 or m) next to the proper description. ______ the cell grows by producing more proteins and organelles. ______ dna replication occurs. ______ the cell prepares for cell division with the appearance of centrosomes. ______ mitosis and cytokinesis occurs.
African americans experience· ______ , which tends to increase· blood· pressure . 1. a diet higher in salt· than european americans 2. a diet lower in fat· and higher in fiber· 3. larger and more cohesive families 4. discrimination· based on skin· color· 5. a stress-diathesis based on their genes
Which organelle generates energy to power cellular activities?
Answer:
Mitochondria
Mitochondria are rod-shaped organelles that can be considered the power generators of the cell, converting oxygen and nutrients into adenosine triphosphate (ATP). ATP is the chemical energy "currency" of the cell that powers the cell's metabolic activities.
Explanation:
Why was modern classification invented?
Answer:
Modern classification was invented in order to classify the organisms more clearly.
The organism were classified based on their similarity in characters. Then day by day the number of organisms increased and there was confusion in classifying the organism based on the prior knowledge.
Thereafter modern classification was introduced to simplify the classification by offering more wide are for the classification of a wide variety of organism.
More diversity of species of organism is available these days so there was a need to revise the classification with some modifications in it.
All platyrrhines __________.
a. have a relatively large body size
b. have three premolar teeth
c. are primarily terrestrial
d. all of these
In glycolysis, the isomerization of glucose to fructose is necessary because
Which of these is a piece of evidence supporting the theory of evolution?
a) Ostrich resemble armadillos.
b) Armadillos resemble emus.
c) Glyptodons resemble armadillos.
d) Finches resemble glyptodons.
The discovery that the glyptodon and armadillo are related is one piece of evidence for evolution. Thus, option C is correct.
What similarity between Glyptodons resemble armadillos?The only difference between glyptodons and armadillos is that the former are significantly larger (the size of a Volkswagen Beetle!) than the latter.
Because they still share a lot in common, the evolution of the armadillo from the prehistoric glyptodon helps to substantiate this. They are related genetically.
The massive bony shell that both armadillos and glyptodons have serves as an armored shield to defend the animal from predators.
They were the only mammals with genuine shells during their respective eras. Both creatures also have soft, uncovered bellies and short, stubby legs.
Therefore, Glyptodons resemble armadillos is a piece of evidence supporting the theory of evolution.
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The student nurse is preparing a presentation on celiac disease. what information should be included? select all apply.
What word should you always associate with “lipids”?
(( there is no answer options just give me a suggestion))
The association of the term 'lipids' should be with 'fats'. Lipids include a variety of substances such as fats, waxes, sterols, and fat-soluble vitamins, all serving critical roles in the body, like energy storage and cellular function.
Explanation:The term that you should always associate with lipids is fats. Lipids are a group of naturally occurring molecules that include fats, waxes, sterols, and fat-soluble vitamins, among others. Lipids serve important functions in the body. They serve as energy storage, and insulation for our bodies, and are an essential component of all cell membranes. One of the common examples of lipids is triglycerides, which are the primary form of fat stored in the body. So, when you think of lipids, think of fats or fatty substances.
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Which organelle is the power house of the cell the site of cellular respiration
What is the name for the percentage of space not occupied by solid matter in soil
which is the largest organizational level found in one coral reef?
In case anyone googled this and it comes up, its ecosystem for E2020.
If your body is capable of making only certain amino acids, how do we get the essential amino acids we need?
I NEED HELP QUICK
The human body is capable of making non-essential amino acids. On the other hand, it derives the essential amino acids from the diet and the foods from external sources.
What are essential amino acids?Essential amino acids are the category of amino acids that are not produced or synthesized by the body and have to be taken from external sources like a diet.
The nine of twenty amino acids are considered to be essential and include leucine, methionine, valine, lysine, isoleucine, histidine, phenylalanine, tryptophan, and threonine.
They come from various food sources like fish, egg, dairy, tofu, soy sauce, etc., and are required for muscle building, growth, and repair, immunity, synthesis of hormones, etc.
Therefore, essential amino acids are derived externally from food.
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When a cell is infected by a virus, synthesis of ______ begins and this protein diffuses away from the infected cell to protect nearby uninfected cells by binding to surface receptors and initiating synthesis of antiviral proteins?
8. Triglycerides which are…
a. Solid at room temperature are called “______________________”
b. Liquid at room temperature are called “______________________”
a. Solids at room temperature are called "saturated fats."
b. Liquid at room temperature are called "unsaturated fats."
a. Solids at room temperature are called "saturated fats."
Saturated fats are triglycerides that have no double bonds between the carbon atoms in their fatty acid chains. Due to their chemical structure, they tend to pack closely together, resulting in a solid or semi-solid state at room temperature.
b. Liquid at room temperature are called "unsaturated fats."
Unsaturated fats are triglycerides that have one or more double bonds in their fatty acid chains. These double bonds introduce kinks or bends in the structure, preventing them from packing closely together, and resulting in a liquid state at room temperature.
Examples include most vegetable oils like olive oil, canola oil, and sunflower oil. Unsaturated fats are generally considered healthier than saturated fats and are often associated with beneficial effects on heart health when consumed in moderation.
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What is a type of soil that has significant amounts of sand, silt, and clay ??
How do single-celled decomposers get energy?
A.
They make their own food.
B.
They use a process called budding,
C.
They feed on living organisms.
D.
They break down dead organisms.
The answer would be D.
A decomposer is an animal, or plant that is used to break down chemical substances. (I just looked up on google to define decomposers to be sure)
Hope this helps my friends :)
Hormones derived from amino acids can cause different effects in different cells depending on the type of cell and ______.
The purity of cocaine in crack averages about __________.
The second stage of catabolic metabolism occurs in the
A. cell membrane.
B. ribosomes.
C. cytosol.
D. mitochondria.
Answer:
C. Cytosol.
Explanation:
The answer is NOT D, because in my book it states that the second stage occurs in the cytosol, and the the THIRD stage occurs in the mitochondria.
Suppose you observed that tina has a circular area without hair on the back of her scalp. what word would best describe this
WILL GIVE A BRANILEST
What did the extinction of the dinosaurs lead to?
the collision of a comet with Earth
the extinction of birds
the evolution of mammals
the destruction of the ecosystem
A blood alcohol concentration above ________ will often result in death
The properties of noncrystalline materials are anisotropic. true or false
It is false!
Further Explanation:
non crystalline mean:
In consolidated issue material science and materials science, a nebulous or non-crystalline strong is a strong that does not have the long-extend request that is normal for a precious stone. Different kinds of indistinct solids incorporate gels, dainty movies, and nanostructured materials, for example, glass.
Case of a non crystalline strong:
A few models incorporate sodium chloride, ice, metals, and jewels. Undefined solids, then again, are unbending, yet they need rehashed periodicity or long-extend request in their structure. These substances don't demonstrate a sharp differentiation between the strong and fluid states.
non crystalline silica:
Silica is synonymous with silicon dioxide (SiO2). ... Silica exists in a wide range of structures that can be crystalline just as non-crystalline (nebulous). Crystalline silica is hard, artificially dormant and has a high liquefying point.
Distinction among crystalline and non crystalline structures in materials:
The distinction among crystalline and non crystalline solids is that crystalline solids have a uniformly disseminated three-dimensional course of action of iotas, particles, or atoms while non-crystalline solids don't have a predictable game plan of particles.
Subject: biology
Level: college
Keywords: non crystalline mean, Case of a non crystalline strong, non crystalline silica, Distinction among crystalline and non crystalline structures in materials.
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Which of the following is an example of a beneficial mutation?
a mutation causing uncontrolled cell division in human tissue cells
a mutation inhibiting human immunodeficiency virus from entering the host cell
a mutation resulting in partial or complete loss of chlorophyll pigments in plants
a mutation resulting in a squirrel being born without ovaries
A beneficial mutation is one that provides an advantage or benefit to an organism. An example of a beneficial mutation is a mutation inhibiting human immunodeficiency virus (HIV) from entering the host cell.
Explanation:An example of a beneficial mutation is a mutation inhibiting human immunodeficiency virus (HIV) from entering the host cell. This mutation could potentially protect individuals from contracting HIV if the virus cannot enter and infect their cells.
On the other hand, a mutation causing uncontrolled cell division in human tissue cells can lead to cancer, which is not beneficial.
A mutation resulting in partial or complete loss of chlorophyll pigments in plants can impair their ability to carry out photosynthesis and obtain energy from the sun, which is also not beneficial.
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Which process causes the easterlies to flow in the direction they do? A. movement of a convection cell B. even heating of the earth at all places C. solar wind D. Coriolis effect
Answer:
D. Coriolis effect
Explanation:
The esterlies are the air currents that are located in the poles and are cold irregular currents with low pressure, the usually travel towards the equator but then are deflected and follow the west due to the coriolis effect. SO from the options the one that is correct would be the coriolis effect.
What is a change of a substance from one form to another without changing its composition called?
Atomic Change
Chemical Change
Molecular Change
Physical Change
The correct answer would be moleculer change because physical change is literally the exact thing that the question is telling us that we need to have the out of the answer (composition) and chemical change is like (for example): If we have an egg and we crack it and the yoke comes out, and that would have to be composition because we have to crack the egg. And we can't change somethings molecules. So that would be the answer (moleculer change).