Thyroid hormone is to amphibian metamorphosis as this compound is to insect molting.
A. cortisol
B. ecdysone
C. aldosterone
D. butterfly peptide
E. estrogen
Answer: B
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DNA replication
A) requires a type of RNA polymerase. B) is partially regulated by promoter/terminator sites. C) proceeds by making two continuous strands. D) is not edited once polymerization has occurred. E) is conservative.
Four elements make up more than 96% of the mass of most living organisms. Which of the following
is NOT one of those four elements?
a. sodium b. carbon c. oxygen d. nitrogen e. hydrogen
What subunits make up the DNA polymer?
a. ribose combined with one of the four bases A, T, G, or C b. deoxyribose combined with one of the four bases A, T, G, or C c. amine groups combined with sugar-phosphate groups d. amine groups combined with one of the four bases A, T, G, or C
Industrial melanism involving the peppered moths (Biston sp.) is cited as an example of natural selection that has been observed in the last one hundred years. Recall that the peppered moth exhibits two distinct morphological types with dark and light colored wings. Which of the following statements about changes in these two types of moths as a result of industrial melanism is true?
A. The dark forms are selected against in nonpolluted forests. B. The dark forms are distasteful to birds and are thus safe in polluted forests. C. Dark forms emigrate from nonpolluted forests to polluted forests. D. The light forms are selected against in nonpolluted forests. E. Birds prey more on the dark forms in polluted forests