During weeks 17-20, quickening occurs, which is when the A. fetus' sense of hearing is developing at a rapid pace
B. mother can hear the fetus' heartbeat with headphones
C. fetus' heart rate increases to 150 beats per minute
D. mother is able to feel the fetus move inside her womb

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

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now

How energy move through ecosystem ?