What is the role of decomposers in an ecosystem?
OA. Decomposers are herbivores.
B. Decomposers break down dead organisms and return nutrients to
the ecosystem.
C. Decomposers convert solar energy to chemical energy through the
process of photosynthesis.
D. Decomposers feed on small reptiles and mammals.

Meselson-Stahl's experiment contributed to our understanding of DNA replication because the use of radioactive nucleotides showed that one DNA strand is synthesized in each round of replication while the other chain remains unchanged, which is known as semiconservative replication.

In genetics, semiconservative replication refers to the process by which DNA is duplicated during the process of DNA replication. In semiconservative replication, one DNA chain is conserved in intact conditions while the other one is synthesized in the final double helix DNA molecule.

Meselson-Stahl's experiment contributed to the discovery of the semiconservative nature of DNA replication by observing that only one radioactive chain was added to each round of replication.

Therefore, with this data, we can see that the semiconservative replication of the double helix DNA molecule is a fundamental process associated with DNA replication which was discovered by Meselson-Stahl's experiments.

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Remember that biological carbon fixation is the process by which inorganic carbon (such the carbon dioxide) is converted to organic compounds by living organisms. Now, remember that the biological carbon cycle describes the flow of carbon between the atmosphere and Earth's ecosystems.

We can conclude that the correct answer is:

A. the carbon cycle

D.Temperature

Explanation-The atmosphere can be divided into layers based on its temperature, as shown in the figure below. These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere. A further region, beginning about 500 km above the Earth's surface, is called the exosphere

The moment of a system results from adding the vectorial moments of each object composing the system. According to the law of conservation of momentum, the initial moment is equal to the final moment. D) -31 kg m/s.

First, let us remember that momentum or lineal momentum is a motion quantity. In physics, it is the fundamental quantity that characterizes the motion of any object.

The momentum is a vectorial quantity calculated as the product of the object mass by its lineal velocity ⇒ mv.

The total lineal moment of a system constituted by a group of objects, is the sum of the vectorial moments of each of the objects.

In an isolated system (like crushes, explosions, and collisions), the moment remains constant through time. This is the law of conservation of momentum. The initial moment is equal to the final moment ⇒ Pinitial = Pfinal

In the exposed example,

121 kgm/s + (-80 kgm/s) = P initial

72 kg m/s + X = P final

Pinitial = Pfinal

121 kgm/s + (-80 kgm/s) = 72 kg m/s + X

Now, we just need to clear X to determine the momentum of the quarterback after the collision.

121 kgm/s - 80 kgm/s - 72 kgm/s = X

121 kgm/s - 80 kgm/s - 72 kgm/s = - 31 kgm/s

Option D is correct.

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Meiosis creates cells with half the number of chromosomes of the original cell. It produces four gamete cells. Mitosis creates 2 identical daughter cells with the same number of chromosomes as of the parent cell.

Meiosis is the process that form sex cells. Telophase is one of the stage of mitosis. Spermatogenesis and oogenesis occurs via meiosis.

Answer - B. Meiosis creates cells with half the number of chromosomes of the original cell.

Self-esteem and body image start in the mind itself. They can completely alter the way you understand your worth. Healthy body image and self-esteem are important part of well-being.

Body image is mental as well as emotional. It’s the mental picture that you have of your body and also the way you feel about your own body when looking in a mirror.

Self-esteem is generally about how you value and respect yourself as a person. Self-esteem greatly impacts how you take care of yourself emotionally and physically. Self-esteem is about yourself as a whole and not just the body.

When you have good self-esteem, you value yourself, and also know that you deserve care and respect .You appreciate and celebrate your strengths and abilities. Don’t put yourself down if you make a mistake. Good self-esteem means that you feel good even when time and situations are difficult.

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Answer:

It goes down

Explanation:

The net flow of molecules is always down their concentration gradient

Answer:

1) Proteins consist of the elements carbon, hydrogen, oxygen, nitrogen, and sulfur. Whereas nucleic acids are Nitrogen (N), Oxygen (O), Carbon ( C), Phosphorous (P), and Hydrogen (H)

2) Nucleic acid monomers are called nucleotides; protein monomers are called amino acids.

Explanation: Proteins are one of the primary constituents of living matter. They consist of long chains of amino acids, which are bonded together by peptide linkages and are thus called polypeptides. There are about 20 amino acids, and the atoms most prevalent in these are carbon, hydrogen, oxygen, nitrogen, and sulfur.

Nucleic acids contain the same elements as proteins: carbon, hydrogen, oxygen, nitrogen; plus phosphorous (C, H, O, N, and P).  Carbon, hydrogen, oxygen, nitrogen, and phosphorous act as the building blocks for nucleic acids. and the five elements necessary to construct a nucleic acid chain are carbon, hydrogen, oxygen, nitrogen, and phosphorus.

YOU HAVE TO DO # 3 though I'm not doing it all for you

The independent variables of measuring physical properties are given below -

What is physical properties?

A physical properties in any property that is measurable, whose value describe a state of physical system.

The changes in the physical properties of a system can be used to describe its changes between the  momentary that state of

physical properties are often referred to as observables.

They are not modal properties.

Any variable that can be attributed a value without attributes a value to any to any other variables is called independent variables.

It is a variable that stands alone and isn't changed by other variables you are trying to measure.

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Enzymes are said to be specific because an enzyme binds to only one or one group of substrates for its activity.

The enzyme's specificity is a property that indicates how restricted the enzyme is in its substrate selection; There would only be one substrate for a completely unique enzyme. Specificity is the capacity of an enzyme to select a specific substrate from a variety of chemically similar compounds. Specificity is a molecular identification process due to the complementary structural and conformational properties of the enzyme and substrate. Since the specific substrate must fit into the enzyme's active site before catalysis can take place, only well-designed molecules can be enzyme substrates; An enzyme will frequently react with a single naturally occurring molecule or substrate.

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Since we now that the change in the first positicion C for a Timine allowed the emergence of lineages A and D, we could say its inverse for the emergence of C and E, that is 1 - T -> C. I attempt that since A and D, are a sister clade with C and E, so we the only change there would be the first base. In the branching point behind A - D; C - E, we could propose a change that precede both clades, of course this is a guess and also it is arbitrary. We could say, 2 - T -> C, that is, in the second position, both couples A - D; C - E have a Citosyne.Therefore we would propose that the branch behind the bifurcation (BBB) following A-D; C-E has in its first two bases -CT-. From this point, we move to the branching point that precedes the clades E-H, and B-G. Let's propose that a change in the third base occurs, that goes from A to G. So we would have in BBB this sequence: -CTA- and in the point we are actually inferring CTG. Then, behind the clade F-H, let's propose a change in the fourth position, that goes from G - A. Following the above procedure, the change behind the B - G clade will be 4 - A to G. So for example in the clade A-D we will have this DNA sequence -TCA. In the clade C-E the DNA sequence will be -CCA-. In the clade F-H -CTGA- while in the clade B-H -CTGG-

As we know chloroplasts contain chlorophyll the responsible for the characteristic green color of plants. These organelles can be found in multiple types of tissues nonetheless are more abundant in energy-producing organs such as leaves, therefore the correct answer is option A.

A plasma membrane, made of a phospholipid bilayer containing proteins that control the transit of chemicals into and out of the cell, separates a eukaryotic cell from the extracellular environment.

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In this case, we have a double-cross between a dominant homozygous for both traits and a recessive heterozygous. According to the exercise we have red for dominant (R) white for recessive (w), tal dominant (T), and short recessive (t). So the parents are as follows

Red tall homozygous (RRTT)

White tal heterozygous (wwTt)

We obtain gametes for each parent

Now we obtain the punnet square

Now we obtain frequencies

Genotypes:

Red heterozygous tall homozygous RwTT: 8/16= 50%

Red heterozygous tall heterozygous RwTt: 8/16= 50%

Phenotypes:

Red tall 16/16=100%

Now the gardener would never obtain red short flowers because there is none recessive homozygous for height trait.

Independent Assortment, Random Fertilization and recombination takes place during  Metaphase I and Prophase I. Therefore, option (D) is correct.

Prophase I is when recombination or crossing across happens. Gene by gene, identical chromosomes—1 from each parent—pair along their lengths. Chromosomes break along their length, reunite, and exchange some of their genes. The chromosomes now contain a distinctive collection of genes. This causes genetic variation.

Random Fertilization and Independent Assortment in Metaphase I

The tetrads travel to the metaphase plate during metaphase I with their kinetochores pointing in opposite directions. The homologous pairs randomly align themselves with the equator. This occurrence is the second process that modifies gametes or spores.

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Answer:

Its B. The canopy consists of very tall trees that block sunlight from lower layers.

Explanation:

I got it right on the quiz.

Answer:

C

Explanation:

:)

Answer:

Explanation:

The cell membrane sticks right up against the cell wall when the turgor pressure is high. In this situation, it is hard to distinguish the two structures because they are so close. However, during plasmolysis, the cell membrane is extremely removed from the cell wall and is easy to distinguish

A, Clouds! Hope this helps!

A membrane is referred to as a thin tissue layer that separates, protects, or connects structures and is denoted as option B.

This is referred to as a biological layer which comprises of lipids and other types of compounds which are found in cells and it is usually a thin layer which separates the internal environment from the external areas.

This ensures that the cell is protected as it prevents pathogens and other harmful substances from entering. It also helps to connect different structures together which is therefore the reason why option B was chosen.

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Non-neural cells, both normal and cancerous, communicate over long distances via thin membrane protrusions (TMPs), gap junctions, and exosomes. Long-distance neurons form networks capable of complex computation, which are regulated by macrophage pruning activity.

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The human auditory is divided into 3 parts:

1. The outer ear- involving the externally visible portion of the auditory system along the ear canal.

2. The middle ear - this part transmits sound vibration from the end of the ear canal to the cochlea.

3. The inner ear- the primary organ of the inner ear is the cochlea, the cochlea is responsible for transmitting sound information to the nervous system.

Answer:

A. 0.36 g/cm^3

Explanation:

Hope this is correct for u

Answer:

mass

Explanation:

Mass is a measure of inertia which will stay the same no matter the state of matter

Chloroplasts are found in plant cells.

They can also be found in some algae.

Wetlands are the one located between aquatic and terrestrial environments and reduces the flooding and filters water.

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In Biology, group behavior refers to actions made by one organism that help to the survival of another organism in the group.

Some examples are:

• Meerkats have lookouts for predators

• Bees have designated individuals for different tasks, such as foraging for food or defending the nest.

• Sharing food resources.

• Migrating birds fly in formation to conserve energy.

• Fish swim in schools to avoid predators

One consequence of the organisms living in groups and doing group behaviors is that is easier to find a mate, given that they don't have to travel to find another individual of the same species.

This means that B) having an easier time finding mates, would be the right answer.

The correct answer is C. Computer model

Answer: The membrane would allow water to pass through and reach the hypertonic side.

Explanation: This means that the water will go outside the cell.