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Hitman42 [59]
2 years ago
12

Unmyelinated axons have _____ because the signal must make its way down the entire length of the axon.

Biology
1 answer:
sertanlavr [38]2 years ago
7 0
Slower rate of transmission - this is because it cannot carry out saltatory conduction. Myelin insulates nerve cells along the axon and is present as Schwann Cells on the outer membrane. It allows saltatory conduction to take place as the impulse can just from one Schwann Cell to the next without having to travel the whole length of the axon - but this cannot take place in unmyelinated neurones.
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Species a diverged from species b 60,000 years ago. On a particular gene, they have 15 nucleotide differences. How many nucleoti
a_sh-v [17]

The given question says that b species diverged around 60,000 year ago from species a. Since the divergence, they have a nucleotide difference of 15 nucleotide.

We need to find out the nucleotide difference in another 240,000 year, which means a total of 300,000 year since divergence.

The nucleotide difference in 60,000 years = 15 nucleotide.

The nucleotide difference in 1 year =\frac{15}{60,000}  nucleotide.

The nucleotide difference in 300,000 years = \frac{15}{60,000}\times 300,000 nucleotide.

The nucleotide difference in 300,000 years = 75 nucleotide.

Hence, after another 240,000 years or 300,000 years since divergence, the species and species b would show a difference of 75 nucleotide.

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4 0
3 years ago
The relationship between the bacterium Xenorhabdus nematophila and its nematode host, Steinernema carpocapsae, is classified as
Cloud [144]

Answer:

The correct answer will be-cooperate

Explanation:

Nematodes or ringworms interact with the bacteria in one of three ways: mutualism, parasitism and symbiosis.

The interaction between nematode <em>Steinernema carpocapsae</em> and bacteria  <em>Xenorhabdus nematophila</em> prove to be a symbiotic relationship as both the organisms benefit each other.

The interaction between these two organisms is also known as cooperation because both the species can live without each other also. It is during the infective juvenile stage, the bacteria start living in the intestine of the nematode and benefiting the nematode. Both bacteria and nematode help each other killing the host and then utilizing the cadaver of the host.

Thus, cooperate is the correct answer.

6 0
3 years ago
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