Females of various species shop around for males that _____.
A. are nomadic
B. are highly selective
C. are silent and strong
D. make showy displays
E. have a large family
Answer: D
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You and your friends have just stepped off the plane in Cusco, Peru (11,200 ft). Your friends are so eager to see Machu Picchu they want to start off hiking the Inca Trail right away and not waste any time. How do you respond?
A. "Sounds good, but we had better pack extra water." B. "Sounds good, but we had better bring our warmest clothes." C. "No problem -- we had the whole plane ride to acclimatize to the high altitude." D. “Waiting a few days might be smart, since it takes time to acclimate to high altitude.”
Given that the origin of replication is fixed in E. coli, what signals the location of the origin?
What will be an ideal response?
Which phylum contains the ferns?
a. Anthocerophyta b. Bryophyta c. Pterophyta d. Hepatophyta
The empty center of a single pass transmembrane protein provides a channel for the transport of ions.
a. true b. false