What does fossil evidence show to differentiate Homo erectus from Homo habilis?
a. H. erectus did not use tools.
b. H. erectus was shorter than H. habilis.
c. H. erectus had a larger brain than H. habilis.
d. H. erectus had more pronounced sexual dimorphism than H. habilis.
e. H. erectus was the first member of the genus Homo without pronounced supraorbital ridges.
c
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The general order of classification below the domain or kingdom level is
A. phyla, class, family, order, genus, species. B. phyla, order, class, family, genus, species. C. phyla, order, family, class, genus, species. D. phyla, class, order, family, genus, species.
Excess nutrients in the aquatic environment can cause an initial population surge of primary producers, but eventually results in a collapse of the ecosystem. Which of the following answer choices is not a direct reflection of this statement?
A. Habitats have a particular carrying capacity. B. All trophic levels can be interdependent. C. Communities are shaped by the physical environment. D. Animals interact with their physical environment.
Immigration and __________ permanently affect population size, but __________ does not. Fill in the blank(s) with the appropriate word(s)
How might a species' range be extended?
A) through increased migration rates B) through increased immigration rates C) through climate change D) through decreased reproductive rates