In warm areas, salt is extracted from seawater by:
a. evaporation.
b. freezing.
c. reverse osmosis.
d. chemical methods.
e. filtration.
A
Biology & Microbiology
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Graft-versus-host disease is primarily a
A. type I reaction. B. type II reaction. C. type III reaction. D. type IV reaction. E. type V reaction.
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A taxon that includes all the descendants of an ancestor is called:a
paraphyletic. b. homophyletic. c. monophyletic. d. phenetic. e. polyphyletic
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Members of which group are one of the most important producers in marine ecosystems, although
sometimes they form blooms known as red tides? a. green algae b. red algae c. euglenoids d. dinoflagellates e. brown algae
Biology & Microbiology
Also known as seaweed, ___________________ algae are complex multicellular organisms that live mainly in salt water.
A. Brown B. Red C. Green D. Golden
Biology & Microbiology