The North American maggot fly diverged into two species because some individuals fed on apples rather than hawthorn trees. Apple fruit mature more quickly than hawthorn fruit, therefore maggot flies that fed on apples also developed more quickly. Pea aphids can feed on alfalfa or red clover; some aphids have higher fitness when eating clover others when eating alfalfa. Host preference can
eventually lead to speciation because
A. genetic differences develop.
B. lower fitness may result from choosing the wrong host.
C. temporal isolation may occur.
D. anagenesis may occur.
E. genetic differences develop, higher fitness and temporal isolation may occur.
E. genetic differences develop, higher fitness and temporal isolation may occur.
You might also like to view...
Speciation is the divergence of two populations from a common ancestor. How does it contribute to biological diversity?
A. Speciation increases biological diversity. B. Speciation decreases biological diversity. C. Speciation has no effect on biological diversity.
Where are abscisic acid receptors located in plant cells?
a. cell wall b. cytoplasm c. endoplasmic reticulum d. plasma membrane e. nucleus
Through what process do deciduous plants drop their leaves?
A) thigmotropism B) gravitropism C) abscission D) photoperiodism
Which of the following is the feature that the green algae received their name after?
a. chloros b. photosynthesis c. leaflike form d. filamentous form