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; K-selected 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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Which one of the following statements about transposable elements is correct?

A. They replicate themselves and insert themselves into new positions. B. They are sometimes described as selfish and called the ultimate parasite. C. They make up 45% of the DNA in the human genome. D. They can transpose via DNA replication or an RNA intermediate. E. All of the answer options are correct.

Biology & Microbiology

A trace element is one found in specific organisms in ____ quantities and is ____ for normal biological functions

a. moderate; unnecessary b. moderate; vital c. small; unnecessary d. large; unnecessary e. small; vital

Biology & Microbiology

In the figure above, this group of plants was given treatment II

a. 1 b. 2 c. 3 d. 4 e. 5

Biology & Microbiology

In his comprehensive theory, Steve Hubbell assumes that all species are competitively equivalent and that they have identical fitnesses— their probabilities of death and reproduction are the same. How do we characterize such species (and, indeed, Hubbell's theory)?

A) polarized B) neutral C) niche-differentiated D) complementary

Biology & Microbiology