a student wants to determine the effect of soil type on plant growth. he sets up three pots as shown below. how could this experiment be improved

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.

Several billion years ago which gas was the least prevailant in the atmosphere

What is the one part of the nucleotide  that differs among the other different nucle  tides?