(X"). a.
If a bull who is normal (XN) mates with a cow that is a carrier of the defect, what are the chances of a
male having the defect?

We can use solar powered cars or ride bikes instead of cars that burn fossil fuels

Idk little ngr try paying attention in school and you would know ngr

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.