what is a very long tube that the food passes into after it leaves the stomach? here the food is completely digested and then it’s absorbed through the walls into the bloodstream

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river

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.

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?