Too much exercise can impair the body's immune system and increase the risk of colds.
a. true
b. false
a. true
Biology & Microbiology
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Replication usually begins in GC rich regions due to the presence of only 2 hydrogen bonds between the bases
Indicate whether the statement is true or false
Biology & Microbiology
A production/respiration ratio of one indicates:
a. the reef is productive and exporting nutrients. b. little biomass is available for export. c. the reef may begin to decline. d. community respiration is too high. e. algae are overgrowing the coral.
Biology & Microbiology
The male gametophyte of a pine tree
a. is produced within a pollen grain. b. produces sperm. c. is diploid. d. is both a and b.
Biology & Microbiology
These organisms often have both a polyp form and a medusa form in their life cycle.
(A) Echinoderms (B) Annelids (C) Arthropods (D) Cnidarians (coelenterates) (E) Chordates
Biology & Microbiology