The hydrosphere can be directly affected by pollution from human wastes

The production of cells during mitosis into specialized function is recombination or differentiation

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Which of the following statements about protists are true? a. they are typically found in moist environments. b. they are all unicellular. c. they have a nucleus. d. they are all multicellular.