Graph A shows that ant species richness
a. peaks at the equator.
b. drops by 50 percent at 30 degrees north
latitude.
c. is less than 50 at 60 degrees north latitude.
d. is somewhat greater at 30 degrees north
latitude than at 30 degrees south latitude.
e. includes all of these
E
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A __________ is a noncellular infectious particle with a protein coat enclosing DNA or RNA. Fill in the blank(s) with the appropriate word(s)
In transcription,
a. several RNA molecules are made from the same DNA molecule. b. a promoter sequence is needed. c. DNA produces messenger RNA. d. a specific enzyme called RNA polymerase is required. e. all of these occur.
Which organisms can do photosynthesis when there is light and become heterotrophs in the dark?
A. foraminifera B. zoomastigotes C. euglenoids D. diatoms E. dinoflagellates
Which of the following is considered "non-coding" DNA?
A) exons B) introns C) genes that are not constantly transcribed but may be turned on in some cells D) rRNA genes