veins take blood back to the heart. which gas would be most abundant in a vein that takes blood from the muscle cells in the arm back to the heart

After which event could you say that evolution has occurred? question 1 options: an allele frequency changes in a population. a white-eyed fly is born into a population of brown-eyed flies. a new predator comes into an environment. an animal gets fat.

Look at the punnett square for an x-linked recessive disease. is it possible for a female offspring to have the disease?

What are simmilarities and differences between anaerobic respiration in animal and yeast cells? would prefer to get simmilarities as i already got some differences. you!