Compare and contrast r-selected and K-selected organisms. Give examples of both plant and animal species that fit

each category. What will be an ideal response?


Concepts to Consider: r-selected organisms are small in size, mature rapidly, have many
offspring, exhibit little parental care, and typically exhibit type III survivorship curves; Kselected
organisms are larger in size, mature slowly, have few offspring, exhibit much
parental care, and typically exhibit type I survivor-ship curves. r-selected organisms are often
pest or "weedy" species such as mice, house flies, or dandelions; K-selected organisms
include many species that are endangered, such as whales or elephants, or long-lived plants,
such as palm trees, that produce fruits (offspring) that are large in size but few in number.

Biology & Microbiology

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