Answer Internal and external environmental factors, like gender and temperature, influence gene expression. ... Similarly, drugs, chemicals, temperature, and light are among the external environmental factors that can determine which genes are turned on and off, thereby influencing the way an organism develops and functions.
Explanation:
To be characterized as a chordate, an organism must:________.
A) possess a backbone in both the larval and adult stages
B) display all four key characteristics of Chordata in both the larval and adult stages
C) display each of the four key characteristics of the chordates at some point in the life cycle
D) possess a backbone in at least one life stage.
Answer:
C) display each of the four key characteristics of the chordates at some point in the life cycle
Explanation:
To be characterized as a chordate, an organism must display each of the four key characteristics of the chordates at some point in the life cycle. Therefore, the correct option is C.
To be characterized as a chordate, an organism must display four key characteristics at some point in its life cycle.
These characteristics include having a notochord (a flexible rod-like structure), a dorsal hollow nerve cord, pharyngeal slits or pouches, and a tail.
It is not necessary for all four characteristics to be present simultaneously or in both the larval and adult stages. As long as the organism exhibits these characteristics at some stage of its life, it can be classified as a chordate.
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what are the main principles of the natural selection?
PLEASE ANSWER ILL GIVE ALL MY POINTS AND GIVE 5 STARTS AND A FAVRIOTE (Ty) The first step of the Nature of science is to come up with a __________________?
Hello There!!
I think the answer is:
Ask a question....
Because, Usually it's good to ask question before doing the next steps.
Here's a Explanation.
What if the person is new here and It didn't know where to go or how to do the project or the person were asking for.
And, If the person did it without don't know what to do it's good to ask question instead before doing it!
[tex]GoodLuck![/tex]
[tex]Loserbrazts[/tex]
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Answer:
the first thing that u do is make a observation and then you ask a question based on the observations you made
Explanation:
Hope this helps!
justify why amphibians are not fully adapted on land
Answer:
Explanation:
Amphibians are not fully adapted on land because there skin is soft and without scales which makes difficulty to survive under the sun .
HELP ASAP!!!
Which group of elements are present in all macromolecules in living things? (8.9A)
C, H, P, N
C, H, O
Na, CI, O
OS S. P, C, O
Answer: the answer is C,H,O
Explanation:Option B is correct
Answer:
c,h ,o
Explanation:
When presented with the question “Does soil acidity have an effect on the production of peppers,” develop a hypothesis to answer this question and then design a small controlled experiment to test the hypothesis, listing all procedures and variables. PLEASE PLEASE SOMEONE HELP!!!!!!!!!!!
Answer:
well just search in google if someone did a lab and then copy the lab. But basically, yes it would. The pepper plant would either die or have to adapt to the acidic soil which it wouldn't be able to do. But have a control which has no acidity and then have three other plants with more acidity then the last and watch them grow.
Explanation:
what are the basic building blocks of fats?
Answer:
Fatty acids are the building blocks of the fat in our bodies and in the food we eat. During digestion, the body breaks down fats into fatty acids, which can then be absorbed into the blood. Fatty acid molecules are usually joined together in groups of three, forming a molecule called a triglyceride.
15. The complex carbohydrates pictured below are made by linking
molecules of glucose. In all three complex carbohydrates, the subunits of
glucose are bonded together differently. Because they have different
structures, they most likely - *
Starch
Cellulose
Glycogen
pain i need the answer
Answer:
they perform different functions
What structure encloses the pituitary gland?
Answer: Im pretty sure that it is the sella turcica
Explanation:
hat type of cells do not undergo mitosis?
Answer:
Neurons, cardiac muscle, Red/white blood cells, skeletal muscle, smooth muscle, sperm cells, egg cells
Explanation:
can anyone help me with the questions above?
it says : which type of market structure consists of many firms which drive the price of a good or service down?
the answers are there
Answer:perfect competition
Explanation:
5)
Which statement is an example of an inference that a student makes to determine that this is likely a plant cell?
A)
The cell is too small to be seen by the eye.
B).
The cell appears to have a nucleus and vacuoles.
Eliminate
The cell appears to have a large area of cytoplasm.
D)
The cell appears to be rectangular in shape and has a cell wall.
Answer:
D) the cell appears to be in a rectangular shape and has a cell wall
Explanation:
animal cells don't have cell walls
A stimulus causes a change or response in an organism.
O True
O False
a
Answer:
the answer is true
Explanation:
I hope that's helps
A stimulus causes a change or response in an organism. This statement is true.
What is Stimulus?A stimulus is defined as a detectable change in the physical or chemical composition of an organism's internal or external environment. It is the ability of an organism or organ to detect external stimuli so as to make an appropriate response is called sensitivity.
A stimulus can also cause an action or response which is like the ringing of the alarm clock even if we didn't sleep through it. The stimulus can include:
Irritants.Sights.Smells.Sounds.Temperature changes.A stimulus causes a change or response in an organism where the shape of a cell can tell about the job the cell is doing. Cell theory is the result of one person's hypothesis and observation.
Thus, a stimulus causes a change or response in an organism. This statement is true.
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How are mean and median alike?how are they different?
Answer:
Mean is the average you'll get when you add all your numbers then divide by the number of numbers you have. On the opposite side, median is the middle number within your list of numbers. If there isn't a middle number, take the two middle numbers and add them. Now, for how they are alike, I'm not so sure :'), but my closest guess would be they are fairly close together.
Sorry it's so long, hope I helped you :')
Explanation:
30. An anatomist wishes to make detailed comparisons of
medial surfaces of the left and right sides of the brain. This
work requires sections that show the entire medial surface.
Which kind of sections should be ordered from the lab for
this investigation?
Answer and Explanation: In anatomy, bodies are divided by hypothetical geometric planes to describe location or direction of its structures. These planes are called Planes There are 3 reference planes:
1) Sagittal Plane divides the body into sinister and dexter (left and right) sides.
2) Coronal Plane divides into anterior and posterior portions.
3) Transverse Plane divides into superior and inferior portions.
For the anatomist, to have a section that shows the entire medial surface, should be ordered the Sagittal Plane, more especifically midsagittal (median) plane.
Which statement about enzymes is true? A. An enzyme functions to decrease the rate of a chemical reaction. B. Enzymes are proteins that function as catalysts in nonliving things. C. Each enzyme can catalyze many different biochemical reactions. D. Enzymes and substrates fit together like a lock and key.
Enzymes are proteins that are like keys and fit into the lock called substrate to carry out the reactions. Thus, option D is accurate.
What are enzymes?Enzymes are involved in metabolic reactions and act as catalysts by speeding up the reactions. They do not decrease the activity function of the rate of reactions in the living things.
A specific type of enzyme can catalyst only a single type of substrate and are unique for a reaction. Enzymes and substrates act as lock and key that fits together to carry out the reaction.
The active site of the enzymes is unique and fits into the substrate to form the complex resulting in a product formation.
Therefore, option d. enzyme and substrate are lock and key.
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What is the appropriate protein portion for men?
A. 2 palm portions
B. 3 palm portions
C. 2 cupped handfuls
D. 3 cupped handfuls
Answer:
A is correct- 2 palm portions is an appropriate protein portion for men
Explanation:
Two palm portions is the appropriate protein portion needed for men. It is advised to consume 0.8 grams of fat per kilogram of body weight. So, option A is right.
Amino acids are the building blocks of proteins. Your body requires amino acids to create hormones and enzymes, as well as to build and repair muscles and bones. They can also be utilized as a source of energy.
For a typical sedentary adult, the suggested dietary allowance is 0.8 grams per kilogram of body weight.
For men, 2 palm sized portions of protein is recommended in each meal. Palm is used to measure protein and handfuls is used to measure carbohydrates.
30 grams of protein are contained in one palm serving. Two palm pieces would therefore provide roughly 60 grams of protein for a man having 50-70 kilogram, which is a sufficient quantity for most guys.
Therefore, option A, 2 palm portions of protein is the appropriate protein portion for men is the correct answer.
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Phenytoin (sodium channel blocker) and ethosuximide (calcium channel blocker) are anti-seizure drugs that stop seizures from happening. These drugs work by inhibiting electrical impulses (action potentials) from occurring. Explain the importance of sodium and calcium channels on a neuron and and the reasons why action potentials do not occur when these channels are inhibited
Answer:
Phenytoin and ethosuximide are drugs that slow the recovery of the sodium channel during the inactivated state.
That is to say, they prolong the inactivation state of the channel, thus generating that in this way the neuron remains in resting potential and the action potential causing the epileptic attack is not triggered.
On the other hand, these drugs, according to the bibliography of the book "Golan, 3rd Edition, Principles of Pharmacology" have a use-dependent affect capacity, this means that those sodium channels that have more activity will be more affected, in this way Not only is epileptic shock avoided, but if the same happens independently in any neuron, it will not be able to propagate the action potential to its neighboring neurons, therefore the surrounding neurons will not be stimulated and will not be fulfilled. with the sudden rapid discharges that are the most dangerous in some cases of severe epilepsy.
It is important to understand that these drugs affect the ion channels responsible for exciting neurons, that is why by inhibiting them, a constant rest of these neurons is promoted, and they are unable to generate abrupt discharges and dissemination of the electric charge. among them generating epileptic shocks.
The ions in neurons are in charge of indicating or modulating the different neuronal states, if they are inactive, open or closed, they will directly affect the membrane potential, that is, the positive or negative charge of the neuron's membrane.
Explanation:
In order to finish completing the question, these drugs are excreted through the p450 protein, that is why if this excretion system becomes saturated because another drug is consumed that is excreted in the same way, these antiepileptics will remain longer in use. blood and in the body, generating a greater effect and enhancing adverse effects on the central nervous system.
B-cells do which of the following things?
a. Make antibodies
b. Inhibit Function of other T-cells and B-cells
c. Stay in circulation to speed up response to an antigen the next time
d. Stimulate Function of other T-cells and B-cells
e. Take in and process antigens binding them to MHC protein
f. Attack cells infected by viruses
Answer:
a. Make antibodies
Explanation:
B-cells is one of the two types of lymphocytes or white blood cells produced in the marrow of the bone (the other being T-cells). B-cells are a part of adaptive or acquired immunity in our body i.e. a learned defense after a pathogen might have penetrated.
B-cells help combat foreign Invaders that make way into the body by producing ANTIBODIES, which are specific to a particular pathogen. Note that, the B-cells learnt to combat based on a previous infection of such pathogen. In response to an antigen, the B-cells produce the plasma cells, which in turn produce the antibodies.
what is the difference between Dopamine and Seratonin
hope that helps !
The molecule pictured below produced a blue color when tested with Benedict’s reagent, a yellow color when tested with IKI, and a violet color when tested with Biuret reagent. Based on the structure shown below and these chemical results, what kind of biomolecule is this? the molecule a blue color with benedicts reagent.no color change that given molecule is not a simple carbohydrate
Answer:
The molecule is a protein
Explanation:
When the molecule was tested with benedict's solution and a blue color was formed, that actually meant there was no colour change because the colour of benedict's solution is blue. Benedict's solution is used to test for the presence of reducing sugar, which changes it's colour to green, orange, yellow or even red; the fact that there was no colour change shows the molecule is not a reducing sugar.
Yellow colour when tested with IKI (Iodine-potassium iodide) also shows no colour change. IKI reagent is used to determine the presence of starch, which gives off a dark-blue colour if starch is present. Hence, absence of this dark-blue colour or observation of a yellow/orange colour shows the molecules is not starch.
Biuret reagent is used to test for peptide bonds in a molecule. In the presence of a peptide bond, the biuret reagent changes colour from blue to violet. The amino acids in proteins are held together by peptide bond, hence the biuret colour change shows that the biomolecule is a protein.
What cause the slight positive (8+) and negative (8-) poles on a molecule of H20?
Answer:
In the covalent bond between oxygen and hydrogen, the oxygen atom attracts electrons a bit more strongly than the hydrogen atoms. The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms
Because of the water molecule's bent shape and its atoms' unequal sharing of electrons, it has partial positive (δ+) and partial negative (δ-) poles. ... A hydrogen bond occurs when molecules that have hydrogen covalently bonded to oxygen, nitrogen or fluorine interact.
Explanation:
Water is said to be a molecule made of oxygen and hydrogen atoms. There is a partial negative and positive charge at the poles of water due to hydrogen bonds, and electronegativity.
What are hydrogen bonds?Hydrogen bonds are defined as weak chemical bonds and interactions that result from the electrostatic attraction between the electronegative atom and the proton. These bonds are formed by dipole-dipole interactions.
Oxygen atoms in the water molecule are highly electronegative whereas the hydrogen atom of the water molecules is proton donors. This results in the formation of hydrogen bonds between the oxygen atom of one molecule and the hydrogen atom of the other molecules.
The electron sharing between the hydrogen and the oxygen atom tends to be unequal resulting in bonds being slightly towards the oxygen atom due to its electronegative nature. This results in the formation of partial positive and negative charges.
Therefore, hydrogen bonding results in slight positive and negative charges.
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True or False? The low power objective lens has a greater magnification than the high power objective lens.
Answer: true
Explanation: i said so
the wolf population on isle royale fell to just twelve animals after the accidental introduction of canine parvovirus. years later scientists discovered that the skeletons of dead wolves had a high level of deformities in the pelvis and tail bones. how would you explain this finding
Answer:
Genetic drift caused fixation of deleterious alleles that impaired bone development.
Explanation:
With a low population, the effects of parvovirus will have a lasting impact on future generations as the alleles are less likely to be bred out of the population.
Why would specimens viewed with a compound microscope be thin and/or chemically cleared?
Answer:
A specimen has to be thin so that the light coming from the light source is able to pass through the specimen Specimens are sometimes stained with dyes so that they are easier to distinguish and find.
Explanation:
Sorry it took some time but i hope it helps!!
You are running a marathon and observe that running increases your pulse rate. Using what you know about the scientific method complete the following:
1. Hypothesis: __________________________________________________________________
_____________________________________________________________________________
2. Independent variable: _________________________________________________________
3. Dependent variable: ___________________________________________________________
4. Controlled variables (at least 3): _________________________________________________
_______________________________________________________________________________
5. Control Treatment: ___________________________________________________________
6. Experimental Treatment: _______________________________________________
Answer:
hypothesis is A hypothesis (plural hypotheses) is a precise, testable statement of what the researcher(s) predict will be the outcome of the study.
Explanation:
independent variable is what u can change
dependent variable is the one u can measure
control variable is one u keep the same
control treatment In the design of experiments, treatments are applied to experimental units in a treatment group. In comparative experiments, members of a control group receive a standard treatment, a placebo, or no treatment at all. There may be more than one treatment group, more than one control group, or both
experimental treatment in research, the conditions applied to one or more groups that are expected to cause change in some outcome or dependent variable.
Help me plz !!!! A cat that weighs 55 N sits on the top of a cat tree. It is 2 m above a 110 N
dog. How does the mass of the animals relate to the force of gravity on
them?
O A. The mass of the 55 N cat is greater than the mass of the 110 N
dog.
B. The 55 N cat has less mass than the 110 N dog.
C. The 55 N cat has the same mass as the 110 N dog when it is in
the cat tree.
O D. The mass of the 55 N cat will be the same as the mass of the 110
N dog after it jumps to the ground.
Answer:
B. The 55 N cat has less mass than the 110 N dog.
Explanation:
Weight of an object refers to the product of its mass and the force of gravity. However, the greater that mass of an object, the greater the weight of that object.
In this case, the cat's weight is 55N while the dog's weight is 110N. This means that the dog has a greater mass than the cat or alternatively put, the 55 N cat has less mass than the 110 N dog.
Note that: if the gravitational effect is removed, the cat will contain lesser mass.
Answer:
B
Explanation:
The monomers of DNA are composed of?
Answer:
The monomers of DNA are composed of nucleotide.
Answer:
sugar, phosphate residue and a base or Nucleotide's
Explanation:
DNA consists of two long polymers that run in opposite directions forming the regular geometry of the double helix. The monomers of DNA are called nucleotides. Nucleotides have three components: a base, a sugar (deoxyribose) and a phosphate residue.
please give me brainley for this
2. The loss of the structure labeled U in the
figure above results in the formation of
what? SC.8.P.8.7
A isotope
B ion
C element
D) atom
Answer:
element
Explanation:
Answer: element
Explanation:
Why do cells have different shapes if most cells have the same organelles?
Answer:
cells have different shapes because they do different things
Explanation:
each cell type has has its own role to play in helping our bodies
to work properly