The nucleolar organizer is a part of a specific chromosome that directs the synthesis of
A. heterogeneous nuclear RNA (hnRNA).
B. ribosomal RNA (rRNA).
C. transfer RNA (tRNA).
D. messenger RNA (mRNA).
Answer: B
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Answer the question using the accompanying figure. Of the fragments labeled A-D, which is closest to the positive
electrode?
a. A b. B c. C d. D e. it is impossible to tell
The main evolutionary advantage of sexual over asexual reproduction is that it produces _____
a. more offspring per individual. b. more variation among offspring. c. identical offspring. d. offspring in a method that requires less energy from the parents. e. more specialized offspring.
Small plants and animals rely on __________ of
material through their body. Fill in the blank(s) with the appropriate word(s).
An herbivore is indicated by
a. A. b. B. c. C. d. D. e. E.