How is surface water naturally purified? A:freezing water destroys impurities

B:evaporation leaves impurities behind

C:sediments precipitate out

D:soil filters the water

Ineed some everybody. the production of cells during mitosis into specialized function is called: recombination or differentiation

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.