Which of the following make up part of earths groundwater 1.Rivers
2.Wetlands
3.Lakes
4.Aquifers

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Environmental impacts on evolution : mastery test

Which type of respiration takes place when there is no oxygen present