Name the blood vessels that carry blood to and from the upper and lower parts of the body

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

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.

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?