Mendel used more than 28,000 pea plants in his experiments. How did such a large sample size improve the reliability of his results? A. Using many plants ensured that both males and females were available.

B. Using more plants made the experiments much faster.

C. Using more plants was necessary because some were unable to reproduce.

D. Using many plants gave results that supported his prediction of ratios.

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.

12) several teeth were found in an area of flat land covered with trees and plants. the teeth were examined by a paleontologist, and it was determined that the teeth came from a shark. they found many other shark teeth in this area. however, the people who discovered the teeth were puzzled, because there was no source of water near where the fossils were found. what is the paleontologist's best explanation for why the teeth were found in this area? a) sharks used to live on flat land. b) this area was once covered with salt water. c) this area was once covered with freshwater. d) someone buried the shark teeth deep in the ground.