How many chambers does the human heart have? a. one c. three b. two d. four

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above