Exhibit 2-6 -Refer to Exhibit 2-6.Which Graph Depicts the Result of an Result

question 46

Multiple Choice

Exhibit 2-6
-Refer to Exhibit 2-6.Which graph depicts the result of an increase in the number of illegal immigrants entering the country?

• A)(1)
• B)(2)
• C)(3)
• D)(4)
• E)none of the above

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Definitions:

Resistant Populations

Groups of organisms that have developed the ability to withstand environmental pressures, such as chemicals or diseases, that would normally be harmful.

Directional Selection

A type of natural selection in which one extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype.

Selection Differential

A measure of the difference between the mean phenotype of the selected parents and the mean phenotype of the general population.

Narrow Sense Heritability

A measure of how much of the variance in a trait among individuals in a population is due to additive genetic factors.