Explain how a sound's pitch and frequency are related.

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

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.