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3241004551 [841]
3 years ago
13

Match the following. Drag and drop each organizational level so that it properly matches up with its description/term. Each term

reflects a component of the nervous system.
1. Organ level :
2. Cellular level :
3. Chemical level :
4. Tissue level :
5. Organ system level :


A. Brain
B. Neurons
C. Neurotransmitters
D. Neurons and neuroglial cells
E.Brain combined with the spinal cord and spinal nerves
Biology
1 answer:
Ratling [72]3 years ago
7 0

Answer: A. Brain - Organ level

B. Neurons - Cellular level

C. Neurotransmitters - Chemical level

D. Neurons and neuroglial cells - Tissue level

E.Brain combined with the spinal cord and spinal nerves - Organ System level

Explanation: There are five levels of organisation of life; cell, tissue, organ, system and organism.

The smallest unit is cell. Neurons are nerve cells.

Aggregation of cells forms a tissue. Neurons and neuroglial cells aggregate to form nervous tissues and are hence at tissue level.

Aggregation of tissues forms an organ. Brain is an example of organ. It is formed from aggregation of nervous tissues.

Tissues aggregate to form organs while aggregation of organs constitute a system. The nervous system consist of brain combined with spinal cord and spinal nerves.

The nervous system release chemicals called neurotransmitters.

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What is semi-conservative DNA replication and how does it differ from conservative replication? Which type of DNA replication is
fredd [130]

Answer:

Semi-conservative DNA replication:

The semi-conservative model of DNA replication explains that the newly synthesized daughter DNA molecule contains one newly synthesized strand and one parental strand. This model of replication is important and explains the biological significance of replication. The DNA unwinds in this mode of replication.

Conservative model of DNA replication:

The conservative model of DNA replication explains that the newly synthesized daughter DNA molecules has the one DNA helix of parent and the other DNA helix are entirely new. This model does not has a biological significance. The DNA is not unwinds in this mode of replication.

The semi-conservative mode of DNA replication is found in the living organism.

4 0
3 years ago
To assess Mendel’s law of segregation using tomatoes, a true-breeding tall variety (SS) is crossed with a true-breeding short va
lapo4ka [179]

Answer:

0.949367 ≈ 0.95.

Explanation:

The chi square analysis can be done by the formula as follows:

Chi square = (O-E)²/E

Here, O is observed value and E is expected value.

The tall trait follows the Mendel's law, this means the cross between F1 results in the formation of progeny with ratio 3( tall) : 1 (short).

The observed values for set I is  63 tall, 16 short.

The expected value for tall plant =  \frac{3}{4}\times79 = 59.25 .

The expected value for short plant = \frac{1}{4}\times79 = 19.75.

Put these value in the formula for chi square analysis:

For tall plants = ( 63 - 59.25)²/ 59.25= 0.237.

For short plants = (16 - 19.75)²/ 19.75 = 0.712

Total value for set I = 0.237 + 0.712 = 0.95.

Thus, the answer is 0.95.

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4 years ago
What is Respiration?
diamong [38]
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  • Normal definition: The action of breathing, also called ventilation.

<em>___________________________________________________________</em>

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Explanation:

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The answer to your question is 4.
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