Praxis II Biology

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.