Answer:
divide the number of births by population
Explanation:
"Hydrogen Bonds" is the correct answer
Speed. This is more of a physics question.
If the paramecium was not able to contract its contractile vacuole, it would be in danger of bursting. The cell would not be able to hold too much water. This would happen faster if the paramecium was in water with a low salt concentration because there is more water and less salt, so the water would accumulate faster.
