During the life cycle of a seedless plant, a sporophyte releases
. When spores land, they grow into gametophytes. One gametophyte produces sperm cells that fertilize the
cells of another gametophyte, forming a
. This then grows into a sporophyte.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds