Part A: Look at the following sequences of rocks and put the layers in order from oldest to youngest.

Are substances released into the environment that in excess amounts cause damage

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation