Pfiesteria is a(n) ________ that produces a toxin harmful to humans.
A. alga
B. protozoan
C. helminth
D. endospore
E. fungus
Answer: A
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What is the result of DNA ligase's action?
A. DNA is broken up at specific sites. B. DNA fragments are joined together. C. DNA translation occurs. D. DNA transcription occurs. E. DNA is condensed to chromosomes.
Erosion of soils is of major concern throughout the world and happens mostly because of what factor?
A. Soils are exposed and not covered by plants. B. heavy rainfall C. Soils are exposed to winds. D. Soils are not kept fertilized. E. Soils are frequently flooded.
Medications designed to block mast cell granules from being released are most useful for what type of hypersensitivity?
What will be an ideal response?
The similarities in function of hummingbird wings and the wings of a butterfly reflect
A) homology but not analogy. B) homology through convergent evolution. C) analogy and homology. D) analogy but not homology.