Which is the best hypothesis for the extinction of the dinosaurs at the end of the Cretaceous period? A.
Mammals evolved and killed the dinosaurs.

B.
Humans destroyed all the dinosaurs.

C.
The climate changed and the dinosaurs could not adapt.

D.
The dinosaurs killed each other.

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.

Explain how light energy is turned into chemical energy? ! due tomorrow!

How do ratio scale and diagrammatic scale work