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Dima020 [189]
3 years ago
14

Match the following terms and definitions. 1. an electrical nerve impulse sent by nerve fibers to the central nervous system for

interpretation chemoreceptors 2. neurons that detect chemicals such as those found in food effector 3. type of eyes many arthropods have; eyes that protrude outward and consist of many lenses electroreceptors 4. the structure that gives the response to an environmental change compound eyes 5. neurons that detect electrical fields action potential 6. secretion of hormones into the blood stream to affect distant processes endocrine
Biology
1 answer:
vladimir1956 [14]3 years ago
3 0

Answer:

1. an electrical nerve impulse sent by nerve fibers to the central nervous system for interpretation. <u>Action potential. </u>

2. neurons that detect chemicals such as those found in food. <u>Chemoreceptors. </u>

3. type of eyes many arthropods have; eyes that protrude outward and consist of many lenses. <u>Compound eyes. </u>

4. the structure that gives the response to an environmental change.<u> Effector</u>

5. neurons that detect electrical fields. <u>Electroreceptors. </u>

6. secretion of hormones into the blood stream to affect distant processes. <u>Endocrine.</u>

Explanation:  

An action potential is a change in the internal charge of a cell due to depolarization. These changes allow the transmission of a message from any part of the body to the central nervous system. The central nervous system will interpret the message and will give a response.

There are different types of receptors in our bodies. Chemoreceptors are the ones that detect chemicals and produce an action potential or a neurotransmitter. These receptors respond to chemicals. Another type of receptor is the electroreceptors. They detect electrical fields and are only on the skin of aquatic animals.

Compound eyes have a large number of ommatidia. As a result, the anthropods with this type of eyes have a large view angle. In other words, every ommatidium sees an image, and the final product is a combination of all of them.

The effector is the structure that gives an answer once an affector has sent the message to the nervous system that there was a change in the environment.

There are different kinds of secretions, autocrine, paracrine, and endocrine. In the endocrine secretion, the gland secrets hormones into the bloodstream so that they can travel long distances up to their target cell, which is far from the gland.

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DNA replication occurs prior to meiosis and _________. mitosis cytokinesis transcription 2. Adenine with Thymine and Cytosine wi
Thepotemich [5.8K]

Answer:

1. Mitosis

2. Bases

3. Hydrogen

Explanation:

1. DNA replication occurs prior to meiosis and <u>mitosis</u>.

<em>mitosis - cytokinesis - transcription</em>

In cell division, DNA synthesis and replication is carried out during the S phase, in the interphase, a stage that occurs before mitosis and meiosis.

2. Adenine with Thymine and Cytosine with Guanine are known as the nitrogen <u>bases</u> in DNA.

<em>bonds - bases - amino acids</em>

Nucleic acids (DNA and RNA) are composed of nucleotides that contain nitrogenous bases:

<em>DNA: adenine (A), guanine (G), thymine (T), and cytosine (C).</em>

RNA: <em>adenine (A), uracil (U), guanine (G), and cytosine (C).</em>

<em />

3. <u>Hydrogen</u> bonds form and hold the DNA together.

<em>hydrogen - peptide - polar</em>

The complementary nitrogen bases are held together by hydrogen bonds:

<em>A=T (adenine pairs with thymine)</em>

<em>C=G (cytosine pairs with guanine)</em>

3 0
3 years ago
When the Grand Canyon was forming, a population of squirrels were separated into two groups. The north side of the canyon is at
mariarad [96]

Natural selection lead to different species when the squirrels were separated, some of them acquired traits better suited for their new environment. This allowed them to survive and reproduce better than others. Over time, each group evolved to display unique traits for their different environments until one species evolved into two.

Explanation:

The speciation in the squirrels due to the barrier in canyon occurred due to this. Such speciation is called allopatric speciation.

Speciation leads to formation of new species from the existing species due to change in their habitat or physical structure.

The squirrels on the two different side of canyon adapted to the habitat they are in. Their reproductive cycles, habitat and adaptation mode has become different due to the change in environment.

The species of squirrels became two as they reproduce and passed on the traits for survival in the environment which they had adapted.

The squirrels have become <em>reproductively isolated</em> also.

Genetic divergence takes place due to natural selection as squirrels arenow two different species.

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