How much of Earth's land mass is already desert?
A. 10%
B. 1%
C. 40%
D. 50%
E. 65%
Answer: C
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What is the main purpose of flowers?
A. To attract attention in the landscape B. To attract pollinators C. To attract predators D. To be pleasing to the human eye
Which cell characteristic is associated with skeletal muscle?
a. involuntary b. no striations c. can contract without neural stimulation d. multinucleated e. gap junctions allow coordinated contractions
What is the name of the macromolecule that makes up the majority of the cell membrane?
A. nucleotide B. lipid C. carbohydrate D. protein
At a party, one of your friends has just revealed that he and his wife are trying to conceive. What do you advise him to avoid at the party?
A. The melted cheese fondue B. The raw vegetable appetizers C. The loud music D. The hot tub