Final answer:
The independent variable is what the researcher manipulates in an experiment to see its effect on the dependent variable, which is the outcome being measured.
Explanation:
The independent variable is the factor in an experimental study that is manipulated or controlled by the researcher. Its purpose is to determine if it causes any change in the dependent variable, which is the factor being measured or observed. While conducting an experiment, the researcher changes the independent variable in a controlled way and then observes any changes that occur in the dependent variable as a result. A key aspect of a well-designed study is ensuring that the independent variable is the only significant factor altered between the experimental and control groups so that any observed effects can be attributed to it.
Examples
For instance, if scientists are studying the effect of different fertilizers on plant growth, the type of fertilizer is the independent variable because it's what the scientist changes. The growth of the plants, measured perhaps in height or biomass, is the dependent variable because it's what is being affected and measured.
what type of commensal relationship is cattle egret and cattle ?
Answer:
The Cattle Egret follows cattle and eats the insects stirred up by the cattle. They are not benefiting each other or harming each other.
Choose the four variables that are most important to control in an experiment about the rate at which
bread turns moldy
humidity
B time of day
age of bread
type of bread
shape of bread
height of observer
type of shelf surface
type of storage container
Answer:
the most important variables are:
age of bread
type of bread
humidity
Type of storage container
Explanation:
Answer: humidity age and type of break and type is staorage container
Explanation:
which of the following should be used to see small objects that are not visible to the naked eye? A metric ruler, a balance, a microscope, or a transfer pippit?
Answer:
Microscope
Explanation:
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1. Describe what would happen if an organ in your specific organ system stopped working.
(Respiratory System)
If an organ in your specific organ system stopped working. then the other organs will try to rectify the issue and attempt to make a balance state known as homeostasis.
Explanation:
The organs are the important things that make up the functioning of an organ system. Every organ system in the human body are inter dependent on each other's function. For example circulatory system and the respiratory system. If the organs of an organ system fails, then the other organs will try to match the particular organ's function thereby reaching a state of balance.
This process of getting a state of being balanced in a human body human body is called homeostasis. The important organs for respiratory system includes larynx, pharynx, nose, lungs, bronchi and trachea. When there occurs a failure of one organ occurs the other organs will try to do the function to reach a balance within the organ system.
Sample Response: The brain, through the nervous system, sends signals to the muscular system, causing the muscles to move rapidly. This rapid motion produces heat in the body and is observed as shivering. The brain also sends signals to the muscles right beneath the skin. These muscles shorten and tighten, causing the hairs on the skin to stand up. When the hairs stand up, heat is kept in the air trapped within the hairs, which keeps the body warm.
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Hemophilia is a sex-linked genetic disease that is recessive. A mother is healthy and is a CARRIER (heterozygous) for the trait. A father is healthy as well. Using the info below explain how they could have a child with Hemophilia. What would the gender of the child be?
Mom: XHXh. Dad: XH Y
Answer:
The gene that causes hemophilia is passed from parent to child. A mother that carries the gene is called a carrier, and she has a 50% chance of having a son with hemophilia and a 50% chance of having a daughter who is also a carrier.
Explanation:
what role do hormones play in dna replication
PLEASE HELP AND FAST THANK YOU!!!
Answer:
Statement 1: Homologous chromosomes line up at the equator in pairs.
Name of Phase: Metaphase 1
Sequence: 3
Statement 2: The cell replicates its chromosomes
Name of Phase: S-Phase, Interphase
Sequence: 1
Statement 3: Homologous chromosomes separate and move to opposite poles of the cell
Name of Phase: Anaphase 1
Sequence: 4
Statement 4: Spindle forms, DNA coils up in homologous chromosomes come together in a tetrad; crossing over may occur.
Name of Phase: Prophase 1
Sequence: 2
Statement 5: Events occur in reverse order of prophase 1
Name of Phase: Telophase 1
Sequence: 5
Explanation:
Following is a summary of the events of meiosis:
1. Interphase:
Prepares the cell for division. Duplication of DNA, duplication of centrioles occurs and the cell grows in size. At this stage the cell is diploid (2n).
2. Prophase 1:
First stage of Meiosis 1.The centrioles move to the poles of the cell, the nuclear membrane disintegrates, homologous chromosomes pair up (in the form of tetrad), form a chiasmata and then exchange segments of chromosomes with each other. This process is called crossing over.
3. Metaphase 1:
Involves the arrangement of the crossed over, homologous chromosomes on the metaphase plate which is sort of like a web of spindle fibers that originates from the centrioles.
4. Anaphase 1:
The tetrads arranged on the metaphase plate are pulled apart by the spindle fibers. This is the result of tension that build up in the spindle fibers as they grow towards opposite poles.
5. Telophase 1:
The last stage of meiosis 1. Involves the arrival of the chromosomes at the poles, the nuclear membrane starts to form and the chromosomes start decondensing. Telophase 1 yields 2 daughter cells with half the number of chromosomes as that in the parent cell.
Meiosis 2:
Meiosis 2 is exactly similar to mitosis. The only difference is that the haploid cells entering meiosis 2 do not duplicate their DNA. Meiosis 2 just involves the separation of the sister chromatids of homologous chromosomes.
As mentioned above, interphase does not occur before meiosis 2.Prophase 2 involves the disintegration of nuclear envelope, centrosomes start moving to the poles.Metaphase 2 arranges the chromosomes on metaphase plate.Anaphase 2 separates the sister chromatids from the chromosomes.Telophase 2 develops the nuclear envelope and separates the nuclei of the daughter cells into 2. Nuclear division id followed by cytokinesis (division of cytoplasm). Telophase 2 result sin 4 haploid daughter cells with one chromatid from each chromosome.What is the main function of the endocrine system?
A. To control body activities through the release of chemicals
B. To help in body movements and maintaining posture
C. To produce new individuals through fertilization
D. To exchange gases like oxygen across the body
Pls answer fast!! 100pts!!
Answer:
Hello, Here's your answer The endocrine system help control the body through chemicals
Explanation:
"The endocrine system is made up of glands that produce and secrete hormones, chemical substances produced in the body that regulate the activity of cells or organs. These hormones regulate the body's growth, metabolism (the physical and chemical processes of the body), and sexual development and function."
Have a great day!
Answer:
your answer would be a, To control body activities through the release of chemicals
Explanation:
The endocrine system's basic purpose is to control body activities through the release of chemicals
When a bond forms between units of a macromolecule, a water molecule is lost. What is this process called?
Answer:The correct answer will be dehydration synthesis.
Explanation: Dehydration reaction is the formation of larger molecules by the removal or loss of water molecule. It is a subset of condensation reactions in which two functional groups combine toform a covalent bond releasing water molecule as by-product.
Three positive factors about glycolysis is that the process is Slow,Aerobic,and Large amount of ATP molecules.True or false and if false why?
Answer:
Anaerobic glycolysis is referred to as fast glycolysis and aerobic glycolysis is referred to as slow glycolysis
Explanation:
These terms were coined in relation to the amount of ATP generated per mole of glucose. Aerobic glycolysis produces around 38 ATP molecules, while anaerobic glycolysis generates only 2 ATP molecules per mole of glucose
A prescribed burn is _______.
Answer: Hazard reduction burning
Explanation: it is also known as backfire, swailing, or a burn-off. It is a prescribed fire because it is intentionally set to restore a prairie, or to abate greenhouse gas effect. It could also be for the purpose of forest management.
Prescribed burn fires are beneficial because the reduce shrubs, trees and grasses that can start and feed wild fires. They also encourage growth of native vegetation
What might cause your soil to look like that?
what color of visible light do green plant leaves absorb the most
A.Green and red
B.Green and violet
C.Red and blue
D.Blue and green
Answer: it is c red and blue
Explanation:
The attachment of nucleotides to form a complementary strand of DNA during replication
a.
is accomplished only in the presence of tRNA.
b.
is accomplished by DNA polymerase.
c.
prevents separation of complementary strands of RNA.
d.
is the responsibility of the proofreading enzymes.
Answer: is accomplished by DNA polymerase.
Explanation: DNA polymerase is an enzyme that catalyzes the synthesis of a complementary strand of a DNA molecule during replication. The double stranded DNA helix is first unwind by the enzyme known as helicase giving rise to two DNA strands which serve as templates for replication. DNA polymerase then binds to a primer, a short nucleotide sequence and catalyzes the attachment of nucleotides to the primer to form a growing strand that is complementary to the parent DNA.
How are we going to use the materials listed above
Answer:
You need to explain more the question or problem?
Explain how the cell membrane helps the cell maintain homeostasis-a stable internal environment. Name specific structures of the cell membrane and describe their functions in you explanation
The cell membrane is a lipid bilayer that prevents that passage of water and ions. This allows cells to maintain a higher concentration of sodium ions out the outside of the cell. Cells also maintain a higher concentration of potassium ions and organic acids on their inside.
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The cell membrane is a lipid bilayer which prevents the passage of water and ions, allowing cells to maintain a high concentration of sodium ions outside the cell. Cells also maintain high concentrations of potassium ions and organic acids inside them.
What is Cell Membrane?The cell membrane is also known as the plasma membrane. It is found in all cells and separates the interior of the cell from the outer environment by a lipid bilayer that is semipermeable. The cell membrane controls the transport of substances entering and exiting the cell.
Some functions of cell membrane are as follows:
Keep toxic substances out of the cell.Contain receptors and channels that allow specific molecules to pass between organelles and between the cell and the outside environment, such as ions, nutrients, wastes, and metabolic products.This enable organisms to maintain homeostasis by regulating the materials which may enter or leave a cell.
Thus, the cell membrane is a lipid bilayer which prevents the passage of water and ions, allowing cells to maintain a high concentration of sodium ions outside the cell. Cells also maintain high concentrations of potassium ions and organic acids inside them.
Learn more about Cell Membrane, here:
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Which part of an electric circuit resists the flow of charge when it changes electrical energy into other forms of energy?
A. battery
B. copper wires
C. switch
D. light bulb
Answer:
D. light bulb is the most appropriate answer
Explanation:
In an electric circut, presence of light bulb would convert the electric energy (flow of electrons) into light energy (photons). It will also resist the flow because to glow a bulb, electric energy will be required. This principle is also applied to all home based appliances where electric energy is used for several purposes.
Up to some extent, flow of electric energy in copper wires will also result in the loss of energy in the form of heat which is due to natural resistance of metal atoms.
All but one of the conditions will increase the reaction rate of an enzyme. The condition that will NOT increase the reaction rate is
Answer:
decreasing the concentration of the enzyme.
Explanation:
what is the purpose of blood flow
Adaptive radiation in island chains
(finches; honeycreepers)
Exploiting a new niche in a common
location
Extrinsic factor prevents two or more
groups from mating with each other
regularly
Gene flow has been reduced between flies
that feed on different food varieties, even
though they both live in the same
geographic area.
Genetic polymorphism results in
reproductive isolation
Population isolated from another due to
geographic barrier
Populations remain in same physical area.
The gradual formation of the Grand
Canyon split a population into 2 divergent
species
Allopatric Speciation
Sympatric Speciation
Answer:
Exploiting a new niche in a common location - Allopatric Speciation
Extrinsic factor prevents two or more groups from mating with each other
regularly - Sympatric Speciation
Gene flow has been reduced between flies that feed on different food varieties, even though they both live in the same geographic area - Sympatric Speciation
The gradual formation of the Grand Canyon split a population into 2 divergent
species - Allopatric Speciation
What kind of energy does the TV have
Electrical Energy is used by Televisions.
Which statement(s) correctly compare the masses of protons, neutrons, and electrons? Check all that apply.
Protons and neutrons have similar mass.
Protons and electrons have similar mass.
Neutrons and electrons have similar mass.
Protons are smaller than a neutron or an electron.
Neutrons are smaller than a proton or an electron.
Electrons are smaller than a proton or a neutron.
Answer:
Protons and neutrons have similar mass.
Electrons are smaller than a proton or a neutron.
Explanation:
Protons and neutrons have approximately the same mass, but they are both much more massive than electrons
Answer:
Protons and neutrons have similar mass and electrons are smaller then a proton or a neutron
Explanation:
Like many plans to protect
endangered species, the plan
to reintroduce wolves causes
some people to weigh their
own interests against the
needs of a single species. Do
you feel that the decision is a
simple one? Can you think of
other ways to look at this
issue? Explain your answers.
Answer:
Endangered species can be described as the species of animals or plants which are at the verge of extinction. Scientists tend to recognize the importance of every species in an ecosystem and make the world aware of the species which might go extinct. Nowadays, governments and citizens of a country pay much more attention to protect the endangered species.
Although, the wolves were a threat to some ecosystems but scientific researches have shown that these organisms can be beneficial in a number of ways. Hence, measures should be taken to protect these species. However, we can introduce species of wolves where the number of preys is more so that the ecosystem can be balanced.
Final answer:
The reintroduction of wolves is a complex issue with various stakeholders having different interests. The effects on ecosystems, like those seen in Yellowstone National Park, are positive, but conflicts with human activities such as ranching and hunting arise. Conservation decisions require balancing ecological benefits, human interests, and the rights of endangered species.
Explanation:
The decision to reintroduce wolves and its impact on humans and the environment is a complex one, not a simple yes or no question. Stakeholders such as environmental activists, cattle ranchers, and hunters all have differing perspectives on the matter. Environmental activists may favor the reintroduction due to the positive ecological effects, such as those observed in Yellowstone National Park, where wolves changed the grazing behaviors of elk, leading to the regrowth of vegetation and improved ecosystem health. Ranchers and hunters, however, could face challenges like livestock predation and changes to hunting grounds.
In addressing the protection of endangered species and undertaking large conservation projects like building dams, it is necessary to recognize the various winners and losers, including both human communities and wildlife. For instance, with dam projects, while the energy produced can benefit societies, the environmental damage and loss of ecosystem services may be irreplaceable. Thinking about biodiversity conservation, we can also consider the effectiveness of purchasing 'green' products, assessing their true impact on promoting sustainable practices.
Furthermore, when a government informs someone of an endangered species on their property, they may experience a range of emotions from pride to anger. They must weigh their development plans against conservation efforts and seek compromises that balance private rights, public interest, and species protection. Lastly, strategies to deal with human-wildlife conflicts and the effects of rewilding initiatives are essential factors in conservation planning.
What organelle releases energy in the cell
Answer:
mitochondria
Explanation:
How do you think pollination takes place in flowering plants?
3. Jill is blood Type O. She has two older brothers with blood types A & B. What are the genotypes of
her parents with respect to this trait?
Answer:
AB & O
Explanation:
Answer: The possible blood types of the parents are A and B
Explanation: A child inherits one gene from each parent. Blood type A can exist as AO while B can exist as BO because every gene that control a particular feature or traits occurs in pair. There when two individuals with blood types A and B, the possible blood types of the offsprings are AB, A, B, and O.
What is the relationship between mutation, the cell cycle, and cancer? Select all statements that apply.
A. Mutated genes typically allow cells to respond to checkpoint proteins that hat the cell cycle, thus avoiding formation of tumors.
B. As a result of unregulated cells, cells may become cancerous, meaning that the cells grow and divide uncontrollably.
C. Cancerous cells may form malignant tumors that invade and destroy surrounding healthy tissue.
D. Mutated, defected genes may cause cells to become unable to respond to signals that regulate the cell cycle.
Final answer:
Mutation, the cell cycle, and cancer are closely linked since mutations in genes controlling the cell cycle can cause unregulated cell division and lead to the formation of tumors. Specifically, such mutations can disrupt cell cycle checkpoints and create non-functional regulatory proteins, leading to cancerous growth.
Explanation:
The relationship between mutation, the cell cycle, and cancer is crucial to understand the development of cancerous cells. To address the statements provided:
B. As a result of unregulated cell cycle, cells may become cancerous, which means the cells grow and divide uncontrollably.C. Cancerous cells can form malignant tumors that have the potential to invade and destroy surrounding healthy tissue. D. Mutations in genes may lead to cells becoming unable to respond to signals that regulate the cell cycle, contributing to uncontrolled growth.The mutation of genes involved in the cell cycle can lead to the production of non-functional proteins, disrupting cell cycle control and potentially leading to the formation of tumors due to uncontrolled cell division. This loss of regulation can cause cells to bypass the mechanisms that would typically halt their division, allowing them to proliferate and potentially form cancerous growths.
5 Points
What branch of Earth science studies the weather?
O A. Astronomy
B. Hydrology
O
O
C. Volcanology
O
D. Meteorology
SUBMN
If the squirrels in this community died out, how would this change be most
likely to affect another organism in the community?
Answer:
Explanation:
B.the hawks would leave or find another food source.
Answer: B
Explanation:
What is the main difference between weather and climate?
A. The severity of the conditions
B. The length of time over which the conditions are measured
C. The location of the conditions being measured
D. The predictability of the conditions
Answer: Option B) The length of time over which the conditions are measured
Explanation:
Weather is the atmospheric condition of a given area over a short period of time, usually days to several months
Climate, on the other hand, is the atmospheric condition of a given area over a long period of time, usually over 2 years.
Thus, weather and climate differ based on the length of time over which the conditions are measured.
Answer:
The main difference between weather and climate is :
B. The length of time over which the conditions are measured
Explanation: