When a person is exercising, the body needs to deliver increased amounts of oxygen to the muscles. which component of blood ensures that the muscles will receive it?

What type of cell is produced after fertilization occurs and the gametes combines ?

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins