During what phase is the chromosomes number reduced from 2n to n?

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution

During dna replication,each strand of dna is used as a template to produce a complementary strand of dna. this process is shown below. which base will attach to location