Which is the best evidence for evolution? A. new rock layers containing fossils of simple organisms.

B. new rock layers containing fossils unlike existing organisms.

C. old rock layers containing fossils different from existing organisms.

D. old rock layers containing fossils of complex organisms.

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

How do scientists think that gravity affected the formation of our solar system?

Why is permeable soil best for plants that need a lot of drainage?