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Assoli18 [71]
3 years ago
10

What substance is used to make up nerve fibre​

Biology
1 answer:
cupoosta [38]3 years ago
7 0

Answer:Myelin is a lipid-rich (fatty) substance that surrounds nerve cell axons (the nervous system's "wires") to insulate them and increase the rate at which electrical impulses (called action potentials) are passed along the axon.

Explanation:

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A group of six students has taken samples of their own cheek cells, purified the DNA, and used a restriction enzyme known to cut
prohojiy [21]

Answer:

D. The two students who have two fragments have one restriction site in this region.

Explanation:

The DNA samples from the cheek cells were subjected to digestion with a restriction enzyme. This enzyme is an endonuclease and cuts the DNA at a specific sequence only. This sequence is called a restriction site. If the restriction site is not present in the sample DNA, the restriction enzyme cannot cut it. The presence of one restriction site in the sample DNA would cut it into two DNA fragments.

Similarly, the presence of two restriction sites in each DNA molecule would obtain a total of three DNA fragments per DNA molecule.

3 0
3 years ago
The table lists four major groups of plants and shows whether each group has three important traits.
kirza4 [7]

Answer:

A was the answer to mine but u didn't post your diagram so I don't know

Explanation:

6 0
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___ is a type of weathering caused by a chemical reaction which water
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