Martina does not think cross species breeding should be allowed. Which of the following facts best supports her opinion? A) Mules are stronger and have more endurance than horses.
B) Genetically engineered proteins can help fight disease.
C) Quarter horses bred to compete in rodeos are fast and strong.
D) Mules cannot reproduce because they have an odd number of chromosomes.

The answer is D

Explanation:

Mules are corssed by a zebra and a donkey and they have an odd number of chromosomes since they were born from different species.

I think its D

Explanation:

Because the statement is true

a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.  

because they want 2 and yea