Which of these is the foundation for relative dating a. earth is very old b. deeper rock strata are older c. radioisotopes decay at a constant rate d. organism can be closely related to each other.

According to the cladogram, which organisms have roundworms as a common ancestor?

What is the compliment dna strand to the following sequence: ttgactaggcta

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.