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ehidna [41]
3 years ago
7

What is the cell membrane?

Biology
2 answers:
marysya [2.9K]3 years ago
5 0

Answer:

B is the answer

Explanation:

Yanka [14]3 years ago
3 0
B it covers cells beibg an outer layer ...................
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Which is a requirement for natural selection to occur?
KIM [24]

Answer:

Fewer Offspring than the environment can support

Explanation:

It takes time for  a creature to adapt to its  Environment. So that puts off 2.

Your guaranteed to get traits from your parents so that rules out #1

There isn't really an equal probability of survival for an offspring, ruling out #3.

So that leaves us with 4. I'm not biology expert, I'm just letting you know how I did this problem.  Just in case i'm wrong, I would double check with other answers :)

4 0
2 years ago
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The PCR primer ‘D7S820’ is used to amplify the D7S820 locus. Using this gel below, determine whether each person (M1, P1, P2, C1
Ahat [919]

Answer:

1) M1 is heterozygous since it contains 2 bands, which means that it contains one recessive and one dominant allele

P1 is homozygous for this locus, since it contains a single band or is known to be homozygous for the locus or gene.

P2 is hetozygous for this locus because two bands appear in which each band represents one allele for the gene.

ChildC contains two gel bands, representing two alleles and is therefore heterozygous

P1 is the father of the child C1, if we look at the gel, each father shows a similar band, one coinciding with the mother and the second with the father p1

As for the paternity study, the PCR test is not useful, since it provides asymmetric results, thus only one strand information will be provided, and because the DNA is double-stranded, a more complete study is required.:

3 0
3 years ago
What is complementary base pairing? Why is it necessary?
vodomira [7]

Answer:

<u><em>Complementary base pairing is important in DNA as it allows the base pairs to be arranged in the most energetically favourable way</em></u>

<u><em>It is essential in forming the helical structure of DNA. It is also important in replication as it allows semiconservative replication</em></u>

<u><em>A complementary base is either of the two nitrogen-containing sections of a nucleotide that bond together to connect strands of DNA or RNA</em></u>

<u><em>DNA and RNA are complex molecules that are central to genetics and both are made of things called nucleotides.</em></u>

Explanation:

Hope this helps:)

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2 years ago
According to Kate what is the secret of perfect popcorn popping
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Right amount of water is the secret.
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In which of the following ways does the body respond to an increase in skeletal muscle cell activity? by increasing the respirat
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When blood cells break into 2

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