Which of the following is an example of an alternative energy source?
a. gasoline
b. natural gas
c. hydroelectric dam
d. nuclear power plant

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.

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Is there any solid scientific evidence that humans have been cloned?