Are all flowers able to pollinate themselves?

How can you approximate the number of calories required to keep you in energy balance?

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.

Types of scientific inquiry that biologist engage in that cannot be completely controlled