Which condition is essential for natural selection to result in a new
species?
A. Unlimited resources
B. An inherited variation
C. A static environment
D. Along life span

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.

When sodium chloride dissolves in water the sodium cholride dissociates into?

The diagram is represented of a part of a plant cell. identify the locations where proton concentration builds up during photosynthesis and cellular respiration