Under unfavourable conditions, Amoeba shows encystation.what does it mean?

During favourable conditions, Amoeba reproduces by

What does symbiosis mean?

ASSERTION TYPE QUESTIONS : These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is correct explanation of Assertion B. If both Assertion and Reason are true but Reasou is not correct explanation of Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion : Amoeba shows multiple fission during unfavourable conditions. Reason: Chances of survival are less during unfavourable conditions.

Under what conditions is work said to be done?

What does the term biota mean?