In what environment does the wind contribute to the formation of sedimentary rocks?

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.

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.