A limestone bed containing fossils that are 550 million years old is a bed of sandstone containing fossils that are 400 million years old. a. younger than c. older than b. the same age as d. not related to Please select the best answer from the choices provided A B C D

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

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

Which factor that affects biodiversity?