Water found in an river is...

A - Salt Water
B - Fresh Water

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

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