Which would you expect to be more fertile: the soil on a hillside or on a valley floor? why?

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

Which is not a characteristic of bacteria? a. they are unicellular. b. they are prokaryotic. c. they are the smallest form of life on earth. d. they are multicellular.