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Rashid [163]
3 years ago
12

Which structure is not present in all organisms?

Biology
1 answer:
ELEN [110]3 years ago
5 0

A plasma membrane  Hope it helped.

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Describe how ATP is generated in the light reactions​
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What event occurred when the decay of strontium-90 in an igneous rock first started?
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If the following graph represents the decay of strontium-90 in an igneous rock, what event occurred at 0 years on the horizontal axis? 
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3 years ago
If a population is at Hardy-Weinberg equilibrium...
jarptica [38.1K]

Answer:

B. (i) yes; (ii)-yes

Explanation:

If a population is at Hardy-Weinberg equilibrium, allele frequencies can be calculated from the given values of genotype frequencies and genotype frequencies can be calculated if the allele frequencies are given.

For a population in Hardy-Weinberg equilibrium; p+q=1

Here, p= frequency of recessive allele and q = frequency of dominant allele.

And p2 + 2pq + q2 = 1

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2pq = Frequency of heterozygous dominant genotype

q2 = Frequency of homozygous recessive genotype

For example, if frequency of homozygous recessive genotype (q2) is 0.40, then, the frequency of recessive allele (q) will be = square root of 0.40= 0.63

Likewise, frequency of dominant allele (p) in this population will be = 1-q = 1-0.63 = 0.37

3 0
3 years ago
I WILL GIVE BRAINLIST According to the key, what type of fish is pictured below?
Sauron [17]

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crevalle jack

Explanation:

8 0
3 years ago
When we Burn oil that chemical energy transforms into what
Lynna [10]

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Explanation:

from my point of view

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