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Adult male beetles from two groups have non-overlapping wing-spot counts; DNA varies within each. Which conclusion applies the morphological species concept?
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Adult male beetles from two groups have non-overlapping wing-spot counts; DNA varies within each. Which conclusion applies the morphological species concept?
In a population of genetically identical bacteria, exposure to different environmental conditions results in varied protein expression.
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Crosses between isolated populations gave the results shown. Why can their species boundary be difficult to place?
The graph shows outcomes of crosses between three populations. Which grouping is supported by the biological species concept?
Individuals in the same population can differ in height, coloration, and behavior. What does this range of differences illustrate?
Different species; observable traits form distinct groups.
One species; DNA variation outweighs observable differences.
Different species; occupying one habitat indicates reproductive isolation.
One species; reproductive compatibility has not been tested.
Isolation increased abruptly before generation 20.
Complete isolation occurred by generation 40.
Isolation increased gradually across generations.
Compatibility stabilized before generation 30.
P, Q and R are one species
P and Q are one species; R is separate
P and R are one species; Q is separate
P, Q and R are three species
Environmental change
Evolutionary stasis
Phenotypic variation
Genetic drift
