Question

Victoria is conducting an experiment on homeostasis in paramecium, which is a type of single-celled organism. which of these observations provides the strongest evidence of a paramecium maintaining homeostasis?

A. / hen a peramecium is a placed in a warm water, it takes on the temperature of the water.
B. hen a water enters the paramecium by osmosis, the organism responds by pumping out the excess water.
C. hen a paramecium is placed in pure water, water moves out of the cell by osmosis.
D. hen a paramecium is placed in pure water, water moves into the cell by osmosis.

Answer 1

The observation that provides the strongest evidence of a paramecium maintaining homeostasis is:

**B. When water enters the paramecium by osmosis, the organism responds by pumping out the excess water.**

This observation indicates that the paramecium has mechanisms in place to regulate its internal environment despite external changes, actively maintaining balance and preventing excess water accumulation, which is a key aspect of homeostasis.