In order to survive in its environment, a single-celled organism uses a contractile vacuole to remove excess water that diffuses into its cell. Another species, a hydra, also excretes excess water. Both processes involve the use of energy. Based on this information, state whether these two organisms live in fresh water or salt water. Support your answer.

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

here is your answer hope i .

1) a

2)c

3)a

4)c

5)b

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