Which of the following features would tend to
promote water reabsorption by the vertebrate
kidney?
a. many nephridia
b. a long loop of Henle
c. a short collecting duct
d. a short distal tubule
e. a high filtration rate
Answer: b
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Polymerases also have nuclease activities. Which of the following is not a use for the nuclease activities of DNA polymerase I?
A. proofreading during synthesis B. trimming single-stranded ends C. removal of RNA primers D. degradation of viral DNAs E. removal of DNA lesions during repair
The most common planktonic stage of the majority of marine gastropod species is the:
a. trochophore larva. b. veliger larva. c. megalopa larva. d. zoea larva. e. planula larva.
When plotted on a graph, logistic growth rates show what type of curve?
a. J-shaped curve b. K-shaped curve c. S-shaped curve d. R-shaped curve
Metagenomic analysis involves
A) culturing microbes isolated from the environment. B) extracting DNA from cultured microbes. C) analyzing DNA from environmental samples. D) sequencing cloned DNA individually. E) determining culture conditions for different microbes.