An invertebrate statocyst contains ____, which surround movable ____. Changes in body position
move the latter and thus trigger action potentials.
a. statoliths; sensory hair cells
b. sensory hair cells; statoliths
c. otoliths; sensory hair cells
d. efferent neurons; otoliths
e. efferent neurons; statoliths
B
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A recently isolated bacterial strain has been given to you for general characterization of the genome. You begin by isolating the DNA and subjecting it to thermal denaturation. You use Escherichia coli DNA as a reference (A + T = G + C).
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Based on the information in the graph, you can determine that the DNA has a high
A) G-C content with respect to E. coli.
B) pyrimidine content with respect to E. coli.
C) A-T content with respect to E. coli.
D) purine content, with respect to E. coli.
E) none of the above
Recovery from a mass extinction requires about how
long? a. 100,000 years b. none of these because recovery is never possible c. about as long as the extinction required d. less than one million years e. at least 10 million years
When it comes to memory, information is processed based on
a. relevance. b. content. c. route of input. d. size of input. e. how much memory is already stored.
Using organic matter such as manure or compost for fertilizer
A. improves fertility. B. aerates the soil. C. increases the water holding capacity of the soil. D. provides food for beneficial soil microorganisms. E. All answers are correct.