HELP Which of the following best explains the reason humans migrate from one location to another? (3 points) I think is A
Resource availability
Improved worldwide health care
Improved sanitary conditions
Lack of technological advances

Dwarf galaxies are select one: a. relatively rare. b. not very bright c. mostly spiral shaped. d. none of these.

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.

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms