What were the Ediacaran fauna?
A) organisms that seem to be the first life on Earth
B) symbiotic organisms that evolved into cellular organelles
C) the first multicellular organisms found in the fossil record
D) the most ancient ancestors of organisms in kingdom Protista
C
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The algal group most like green plants is the:
a. Chlorophyta b. charophytes c. brown algae d. dinoflagellates e. red algae
The difference between septate hyphae and aseptate hyphae is
A. a difference in haploid and diploid cells. B. a distinction between saprotrophic fungi and parasitic or disease-causing fungi. C. a distinction between plasmodial masses with many nuclei and nonliving zygospores. D. a classification trait that separates basidiomycotes from ascomycotes. E. determined by whether the hyphae have cross walls or lack cross walls.
Beaked whales feed at various depths, but they defecate at the ocean's surface. Nitrogen-rich whale feces deposited in surface waters supply nutrients for algae that are eaten by surface-dwelling fish. Which of the following best predicts what would happen if the whale population decreased?
A) There would be a reduction in surface nitrogen concentration, which would cause an algal bloom B) The surface fish populations would decline due to reduced populations of algae C) The remaining whales would accumulate mutations at a faster rate D) The remaining whales would be forced to forage in the deepest parts of the ocean
Which of the following terms are NOT correctly matched?
A. Poxviridae; chickenpox B. Herpesviridae; infectious mononucleosis C. Picornaviridae; polio D. Picornaviridae; common cold E. Flaviviridae; hepatitis