Contract your biceps muscle. Describe what you did to contract the muscle and which muscle is related. Try the opposite and contract the muscle that was relaxed and describe what happens.

Plants that have reproductive structures called cones are?

If a baby girl guinea pig looks almost identical to its mother, does this then mean that it inherited more alleles from its mother? explain. (hint: think about the vocabulary words dominant and recessive.)

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d