What are adenine, guanine, cytosine, and thymine?

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

Students commonly confuse saccharomyces cerevisiae and staphylococcus aureus when viewed on a microscope slide how could you microscopically differentiate

Ascientist wanted to formulate a pill to attack a specific type of bacteria that infects the throat. which biological component would be best to use as a model for the pill's function? bacteriocytes phagocytes complement antibodies