Hi! My question is attached, please help me fast, this is a timed test and I'm desperate.

Its answer B

Explanation:

From what i found the temperature is being changed upon the oxygen concentration in fresh water and in salt water, the lower the concentration goes the higher the temperature. I hope this helps :)

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

the backbone of the dna and rna compound is sugar phosphate.