Needs to be answerd right away, a mutagen is a)a living thing that has undergone a mutation. b)an agent that causes a mutation in dna. c)a mutation that has affected one gene. d)a chemical that can poison living cells.

Which are forms of nitrogen that are usable by humans

Which of these best describes what occurs during cytokinesis? a) the chromosomes are separated b) the cell begins to divide by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm

What is the correct term for an area of rotating currents in an ocean? when ocean currents combine, they create an area of rotating currents called an