Two students fertilize a pair of pea plants. One plant is Rr, and the other is rr. The offspring produced by these two plants all had the dominant trait. The Punnett square showed that there was a 50 percent chance of the offspring carrying rr genes. So, the student assumes that he made an error in determining the genetic makeup of the plants. Do you think the student made an error, or is there another explanation? Explain your answer.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.