When two frog species, rana pipiens and rana sylvatica, mate, the offspring die early in embryonic development. this is an example of
a) hybrid sterility
b) reduced hybrid fertility
c) reduced hybrid viability
d) mechanical isolation

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

Which of the following is a good definition for the word adaptation? question 1 options: a trait that an organism survive and reproduce in its environment. a change in an organism's environment. the way in which animals obtain food. a temperature change that can cause the extinction of plants and animals.