Dotting the abyssal plain are abyssal hills that rise up to:
a. 100 meters.
b. 500 meters.
c. 1000 meters.
d. 1500 meters.
e. 4000 meters.
C
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Which organ produces bile?
a. stomach b. liver c. gall bladder d. colon
Using the genetic code shown here, predict what type of mutation has occurred in the hemoglobin sickle-cell anemia allele.
Normal allele 5'–GGAAUGAAACAGGAACCC–3'
Mutant allele 5'–GGAAUGAAACAGGUACCC–3'
A. a point mutation, Val to Glu
B. addition of a new stop codon
C. a frameshift mutation
D. a point mutation, Glu to Val
E. a silent mutation
Flowering plants emerged
a. during the Devonian. b. between early and late Carboniferous. c. during the latter part of the Permian. d. at the beginning of the Triassic. e. during the late Jurassic or early Cretaceous.
The sympathetic nervous system is part of the
A. limbic system in the brain mediating emotion. B. somatic nervous system. C. central nervous system. D. learning and memory system. E. autonomic nervous system.