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Kobotan [32]
3 years ago
11

Which part of the cell membrane allows the cell to exist in water?

Biology
2 answers:
Nina [5.8K]3 years ago
6 0
The answer is D.) Phosphate Groups
In-s [12.5K]3 years ago
3 0
It’s d.Phosphate groups!
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The answer is A. a cell
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What is a base?
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I’m sorry if it’s wrong but I think its D
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In a population in which homozygotes (AA and aa) mate preferentially with individuals of the same genotype, which frequency will
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Answer:

It will remain constant...

Explanation:

In accordance with the Mendel's law of segregation, independent assortment as well as Hardy-Weinberg Theorem., no matter what type of cross within the homozygotic characteristics takes place, the frequency of dominant and recessive will remain constant over the whole population even if selective breeding strategy is applied.

For example, the ratio for a single trait of allele will remain 3:1 for a whole population of large numbers

4 0
3 years ago
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rjkz [21]

Answer:

C

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The brother has different alleles for the blood type gene than his sister does.  Blood type is inherited from parents like many other traits that can be displayed on a punnet square.  Depending on what the parents blood type alleles were, the brother and sister could have different blood types.  

A different number of chromosomes doesn't lead to different blood types, so D is wrong.  And A is incorrect because the number genes also does not affect blood type.  And I think the blood type genes are on the same chromosome, so B is wrong.  C is correct because blood type is inherited by alleles, and different alleles can cause different traits, such as blood types.  

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Answer:

nitrogen fixation is the answer

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