Which of the following statements about the r/K selection theory is false?

  1. Most organisms actually display both r- and K-traits.
  2. R-traits predominate in unstable environments.
  3. k-traits predominate in unstable environments.
  4. R-traits are typical when organisms need to be able to effectively compete for resources.
  5. R-traits are dominant in individuals that must reproduce quickly.
Explanation

Answer: B, The statement about the r/K selection theory that is false is that R-traits predominate in unstable environments. R-traits actually predominate in stable environments.

Key Takeaway: In ecology, r/K selection theory relates to the selection of combinations of traits that trade off the quantity and quality of offspring to promote success in particular environments. The terms r and K are actually derived from ecological algebra, where r is the rate of population growth and K is the carrying capacity. r-traits dominate in unstable environments where the ability to reproduce quickly is vital. K-traits are dominant in stable environments where it is crucial that organisms can compete for limited resources.

Note: the answer has been revised based on feedback from user comment

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Additional Answers

t v says:

This answer is incorrect. In the key takeaways, it is explained that r traits dominate in unstable environments due to their high intrinsic rate of increase, therefore B would be an incorrect answer. C is correct, k-selected organisms do not predominate unstable environments, this assumption is false.

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