What are the three main components of modern cell theory?
What will be an ideal response?
All living organisms are composed of one or more cells, the cell is the smallest functional unit of life, and all cells come from preexisting cells.
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Which of the following statements is not true of protists?
A. Moisture is absolutely essential to their existence. B. They make up a substantial fraction of the marine plankton. C. They are not known to cause diseases of humans. D. Most are free living.
Why was it important that Darwin visited islands, and then compared island species with continental species?
A. Because Darwin found unique species on the islands. These island species did not have any of the characteristics of their ancestral continental species. B. Because Darwin's attention was drawn to the uniqueness of the island species, even though they retained some resemblance to continental species. C. Because Darwin's attention was drawn to the uniqueness and variety of finches on the islands, determining that their adaptations came from eating different food than continental species. D. Because Darwin saw very low reproductive survival rates on the island as compared to the mainland. E. Because Darwin observed continental species of finch flying to the islands.
Which primate group is classified as hominins?
a. bonobos b. gorillas c. humans d. gibbons e. orangutans
Humans still have body hair even though it is greatly reduced and serves little function. The hair is a(n)
A) analogous structure. B) vestigial structure. C) mutation. D) homologous structure. E) adaptation.