An s3 heart sound is often associated with?
a. chf
b. copd
c. atrial fib.
d. ventricular fib.

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?

Ture or false evidence for evolution includes millions of fossils

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%