What are two examples of how the urinary system maintains homeostasis in the human body?

What are the similarities between photosynthetic and anaerobic organisms?

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

Dna replication or repair occurs in a cell in all of thw following situations except when