Which finches would be most like the ancestral finch?

Answers

Answer 1

Answer: The correct answer would be B. Warbler Finches.

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Which three substances must be present in mitochondria for the process of aerobic respiration to take place?

Answers

oxygen, enzymes and organic molecules

oxygen, enzymes, and organic molecules

How does this sentence violate the principles of objectivity in writing a summary?

Answers

You didn't provide the sentence that is relevant in this case, however, generally if you would like to be objective in a sentence, you shouldn't include possible issues such as subjective thoughts, judgments, and similar things which have a negative impact on objectivity (and in reality destroy any remaining objectivity in a sentence).

Calcium levels in the body are maintained by hormones. If the blood calcium level rises above a set point, calcitonin is secreted by the thyroid gland and sets into motion responses to lower the blood calcium back to the set point. If the blood calcium level falls below a set point, the parathyroid gland secretes parathyroid hormone that sets into motion responses to raise the blood calcium. These homeostatic responses are examples ofa. positive feedback
b. effectors
c. sensors
d. negative feedback

Answers

Calcium is the most abundant mineral in the body and is essential for the development of bones and teeth. The calcium levels in the body are maintained by the thyroid gland and hormones.

These homeostatic responses are examples of:

Option D. Negative feedback

This can be explained as:

When there is a change in a function and causes the output to decrease and vary the process is called negative feedback.

The body receptors sense a change in the calcium level brings about necessary alterations to counteract the situation.

The endocrine like the thyroid gland secretes parathyroid hormone when the calcium decreases. While calcitonin reduces the excess of calcium in the body.

Therefore, calcitonin and parathyroid balances the calcium levels and is negative feedback.

To learn more about calcium negative feedback follow the link:

brainly.com/question/8563691

Answer:

positive feedback

Explanation:Because when you get motion that means its positive but if doesn't feel motion than that is negative.

Which structure is represented by letter A?Choose 1 answer:

(Choice A)
Cell membrane

(Choice B)
Ribosome

(Choice C)
Cytosol

(Choice D)
Flagellum

Answers

Answer:

Explanation:

It's a ribosome.

:) (Gutschriften)

Answer:

Choice B- Ribosomes

Explanation:

From the figure of a bacterial (prokaryotic) cell (most probably), The Ribosomes are spiky organelles [Marked as A], that are embedded in the Cytosol [Marked as B] of the cell, bounded by the Cell Membrane (wall) [Marked as C] and the cell moves in all directions with a help of its tail-like structure called Flagellum [Marked as D].

The diagram illustrates the process of creating genetically modified corn.What occurs at step 4 in the diagram?
The foreign DNA is placed in a mechanical vector for cloning.
The foreign DNA is placed in a biological vector for cloning.
The foreign DNA is inserted into the host cell genome.
The foreign DNA is isolated by restriction enzymes.

Answers

The answer is The foreign DNA is placed in a biological vector for cloning.

After target genes are identified and isolated, they are usually inserted into a transfer factor. In the process of creating genetically modified crops, the transfer factor is plasmid (a circular DNA molecule) from a soil bacterium Agrobacterium tumefaciens. Therefore, the transfer vector in which the foreign DNA is placed is a biological vector. It is not artificially produced but isolated from the living bacterium.

the answer to this question is B

Which characteristics do cell membranes and cell walls have in common?

Answers

Both protexts the organisms' organelles which are inside the cell.
Animal Cell: Cell Membrane
Plant Cell: Cell Wall
Cellwall is present only in plants, it is not found in all organisms.Compared to the cell membrane, a cell wall is thick and has a rigidstructure. You can see it in a light microscope, because it is visible.It serves as the protective cover that surrounds the plasma membrane in aplant cell. Cell membrane is composed of lipids. Cell walls can be madeup of cellulose or peptidoglycan or chitin.

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