Why is each characteristic or trait represented by two genes? A. Each parent contributes two gene pairs.
B. Each parent contributes a gene pair.
C. Each parent contributes one gene.

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.