Members of the Euglenozoa move within their habitats with the aid of
A. tests.
B. cilia.
C. pellicles.
D. pseudopodia.
E. flagella.
Answer: E
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Lost traps to collect shellfish have a large impact on
a. marine mammals. b. marine birds. c. marine turtles. d. lobster and crabs. e. plankton.
Treatment of plants with fungicides may result in a phosphorus deficiency. What is the most likely explanation for this observation?
A. Phosphorus transporters in the plasma membrane of the plant cells are destroyed. B. Plant cell walls impede the uptake of phosphorus after fungicide has been sprayed to limit the amount of fungicide that enters the plant. C. ATP synthesis is blocked, so phosphorus cannot be absorbed into plant cells. D. Nitrogen fixation is inhibited. E. Mycorrhizal symbionts are destroyed by the fungicide.
The crust of our planet that is made of rock and soil is known as the:
a. hydrosphere b. ecosphere c. biosphere d. lithosphere e. atmosphere
In general, the vessels that return blood to the heart in a closed circulatory system are referred to as
A. capillaries. B. arteries. C. auxiliary hearts. D. veins. E. sinuses.