AP BIOLOGY

EVOLUTION

EVOLUTION OF A POPULATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Species that produce a few, often fairly large offspring but invest a great deal of time and energy to ensure that most of those offspring reach reproductive age.
A
population ecology
B
natural selection
C
r-selected species
D
k-selected species
Explanation: 

Detailed explanation-1: -K-selected species produce offspring that each have a higher probability of survival to maturity.

Detailed explanation-2: -R-selected species are influenced heavily by intrinsic growth rates ("r"), or the maximum population growth rate, and exhibit large increases followed by large decreases in population numbers. K-selected species are controlled more by carrying capacity ("K") and tend to display more stable populations.

Detailed explanation-3: -R-selected species are those that place an emphasis on a high growth rate, and, typically exploit less-crowded ecological niches. They produce many offspring, each of which has a relatively low probability of surviving to adulthood.

Detailed explanation-4: -In the equations describing growth of populations of organisms, r represents the slope of the line representing exponential growth. The letter K represents the carrying capacity of a habitat for members of a given sort of organism.

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