Imagine two species of birds with similar beak sizes and diets. Where the two species are allopatric, we would expect that their beak sizes
A. should be more similar than when sympatric.
B. should be smaller than when sympatric.
C. should be larger than when sympatric.
D. should be more different than when sympatric.
Answer: A
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The fossil Lucy (Australopithecus afarensis) is significant because, at _____ years old, hers is the first species to _____
A. 20 million; have been fully bipedal B. 1.3 million; have hominin brow ridges C. 3.2 million years; be fully bipedal D. 1.3 million; migrate out of Africa E. 600,000; have homin brow ridges
Among other functions, the ____ of a vascular plant performs most of the photosynthesis that is
conducted by the plant.
a. ground tissue b. protoderm c. vascular tissue d. meristem e. dermal tissue
In order for a cell to become cancerous, oncogenes must be , or tumor suppressors are .
A. inactivated; inactivated B. activated; inactivated C. activated; activated D. inactivated; activated E. suppressed; inactivated
The source of a plant's new cells is a type of plant tissue called its
A. tracheid. B. meristem. C. guard cell. D. cortex. E. mesophyll.