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umka2103 [35]
3 years ago
11

Which one is it? this is due today

Biology
2 answers:
garri49 [273]3 years ago
8 0

3 ) is your answer, hope it helps , good afternoon.

Papessa [141]3 years ago
4 0

Answer:

the second one is the correct one

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In samples of DNA isolated from two unidentified species in bacteria, X and Y adenine makes up 32% and 17%, respectively, of the
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Answer:

On the basis of Chargaff's rule, in a double-helical DNA, A = T and G = C (Here A means adenine, T means thymine, G means guanine, and C means cytosine. For X, A is given 32%, therefore, T must be 32%, and the leftover 36% is to be distributed equally between G and C. Thus, G = C = 18% each.  

The assumption formed is that the DNA is a double-stranded structure. The species that exhibits higher G + C content in the molecule of a DNA is steadier at higher temperatures as it melts at high temperature. The species Y, which exhibits G + C in total as 66% is the thermophilic bacterium between the two.  

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3 years ago
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In meiosis, the chromosome pairs do the crossing over where there is an exchange of genetic material between them and because of it the chromatids held together by the centromere are no longer the same.
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Other than closing and opening the stomata, stomata density also can affect the rate of gas exchange as well as transpiration. Stomata density is the presence of the numbers of the stomata per unit area. In heat or sunny area the stomata density is higher than the shady or dark area to increase the transpiration in order to cool down the leaves of the plant which prevent the chloroplast proteins to denature.

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It is C sensory or D not quite sure.
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