Question

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

Answer 1

The rate at which a paramecium's contractile vacuole contracts to pump out excess water provides the strongest evidence of a paramecium maintaining homeostasis.

Step-by-step explanation:

In the experiment, Marianne placed the Paramecia in salt solutions of increasing osmolarity and measured the rate at which the contractile vacuole contracted to pump out excess water. The graph showed that as the osmolarity of the solutions increased, the rate of contraction of the contractile vacuole also increased. This observation provides the strongest evidence of a paramecium maintaining homeostasis because it shows that the paramecium is actively regulating its internal water balance in response to changes in the external environment.

Answer 2

Hello. You did not present the answer options, which makes it difficult for you to receive a specific answer. However, I will try to help you in the best possible way.

One of the most common evidences that a paramecium is maintaining homeostasis is the pumping of water from the vacuoles present in its body.

The paramecium is a protozoan that lives in aquatic environments, mainly those composed of fresh water. The problem with this environment is that water is able to enter the paramecium organism in large quantities and this can promote the disruption of the organism through lysis of the cell. In this case, homeostasis must act quickly and pump water out of the body, through the cell vacuole.

Homeostasis is a regulatory system of the organism, which must promote the balance of the organism, whenever any external or internal factor tries to harm this balance.