It protects the Earth from becoming over heated, but with pollution, global warming has become more apparent because of the destruction of the ozone layer
The answer to your question is A., as the random movement is a movement
We know that height in humans is a polygenic trait because it has a lot of variation. The height gene is controlled by at minimum three genes with six different alleles. If all of these alleles are dominant for the tall gene you will be tall if you are dominant for the short gene you will be short if there is no clear dominance between the two genes you will fall somewhere in the middle.
Your brain stem would be your answer
The main function of the smooth ER is to make hormones and lipids.
