Spiders and scorpions belong to the phylum containing the

A. annelids.
B. cnidarians.
C. arthropods.
D. echinderms.
E. mollusks.


C. arthropods.

Biology & Microbiology

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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.

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology

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.

Biology & Microbiology