A firefly is signaling by its tail light. He is saying,
A. "Don't follow so closely."
B. "I'm ready, willing, and able, sexually."
C. "Food—located one mile south."
D. None of these—the flashes are burning of waste and are not associated with communication.
B. "I'm ready, willing, and able, sexually."
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What type of bonding is likely to occur between two water molecules or strands of DNA?
A. covalent B. ionic C. hydrogen D. both hydrogen and covalent E. both hydrogen and ionic
All mRNA transcripts begin with
a. methionine. b. a ribosome. c. AUG. d. the P site. e. an anticodon.
According to the fluid-mosaic model of the plasma membrane, a lipid bilayer is _____ and has the consistency of ______.
Fill in the blank(s) with the appropriate word(s).
Which process brings particles into the cell by the formation of a vesicle in the plasma membrane?
Endocytosis Exocytosis Homeostasis Osmosis