Which of the following best defines nondisjunction? a. repetitive replications of the same piece of a chromosome b. loss of a piece of a chromosome c. complete exchange of chromosome pieces d. failure of chromosome pairs to separate

In a certain ecosystem owls are predators for mice. the owl population increases and they eat more mice this causes the mouse population to decrease what happens next? a.the birth of mice increases. b. the birth rate of owls increases c. the population of owls decreases d. the population of mice increases

When plants use sunlight to make food, the energy of sunlight is

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above