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vivado [14]
3 years ago
9

What is selective permeability? Why is it important to cells?

Biology
1 answer:
Aliun [14]3 years ago
7 0
Selective permeability is the cell wall being particular about what they let in and out of the cell.  It is important because if the cell just let any old molecule inside, it would be letting potentially harmful things in.  
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Answer:

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Explanation:

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2 years ago
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In a population of plants, the allele for long stems (S) is completely dominant over the allele for short stems (s). If 35% of t
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Answer:

The correct answer would be 48 percent.

It can be solved by using the Hardy-Weinberg equation.

p² +  2pq+ q²  = 1

p + q = 1

where, p² represents homozygous dominant's frequency that is, SS in this case,

q² represents homozygous recessive's frequency that is, ss in this case,

2pq represents heterozygous dominant's frequency that is, Ss in this case.

p represents dominant allele's frequency and q represents the recessive allele's frequency.

Now, the percentage of homozygous recessive or short stems is 35%. Therefore, the frequency of homozygous recessive would be 0.35.

Thus, the value of q² = 0.35

So, q = \sqrt{0.35} = 0.59 which is approximately equals to 0.6.

As p + q = 1 so, q = 1 - 0.6 = 0.4

The frequency of heterozygous (Ss) = 2pq = 2(0.6)(0.4) = 0.48

Hence, the frequency of heterozygous would be 48 percent.

8 0
3 years ago
What does it mean that a hypothesis must be testable? can a hypothesis be proven unquestionably true? why or why not?
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Gregor Mendel determined that all traits have an equal chance of being passed to the next generation.
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