Which of the following is correct for \(r\)-selected species?

A Large number of progeny with small size
B Large number of progeny with large size
C Small number of progeny with small size
D Small number of progeny with large size

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Answer & Solution

Correct Answer

(A) Large number of progeny with small size

Step-by-step Solution

Detailed explanation

(a) : Organisms that are \(r\) selected (\(r\) - strategists) able to colonise a habitat rapidly, utilising the food and other resources before other organisms are established and begin to compete. The rstrategists tend to be relatively small organisms with short life spans (\(e.g.\), bacteria) and often live in temporary or unstable environments; characteristically their survival depends on their ability to produce large numbers of offspring rather than on their ability to compete.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Which of the following is correct for \(r\)-­selected species?

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Which of the following is correct for \(r\)-selected species?