When a horse (Equus ferus) and a donkey (Equus asinus) mate, their offspring is an infertile mule. The mule is an example of a
a. mutation
b. hybrid
c. trait variation
d. speciation event

How can you tell the difference between rough er from smooth er?

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

What processes take place before the mature mrna exits the nucleus?