Spiders and scorpions belong to the phylum containing the
A. annelids.
B. cnidarians.
C. arthropods.
D. echinderms.
E. mollusks.
C. arthropods.
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Oxygen during the early development of the atmosphere was:
a. common. b. rare. c. important for photosynthesis. d. about the same as now. e. created from the cooling of hot lava.
The two photosystems of light reactions are
designated a. type 1 and type 2. b. type I and type II. c. photosystem A and photosystem B. d. photosystem 680 and photosystem 700. e. photosystem I and photosystem II
Transfer of random pieces of DNA mediated by phage is known as
A) transformation of competent cells. B) generalized transduction. C) conjugation. D) transposition. E) specialized transduction.
Hantavirus can be diagnosed by detection of
a. exposure to the virus. b. strength of immune response. c. presence of viral genome. d. all of the above.