Which statement is true for single-celled organisms? a. they are often harmless. b. they always cause disease. c. they only live inside humans. d. they reproduce in a complicated process.

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.

The arrows indicate the direction of wind flow. which place experiences monsoons?

What advantages does a pedigree have over a written passage?