Which of the following is an example of recycling?
A. collecting and remelting aluminum beer cans
B. cleaning and refilling soft-drink bottles
C. using fewer paper products
D. saving leftovers in a peanut butter jar
E. donating furniture to a charity
Answer: A
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What will be an ideal response?
Which of the following correctly describes membrane proteins?
A) They are suspended on the surface of the membrane. B) They are partly embedded in the bilayer. C) They pass completely through the bilayer. D) Any of the above, depending on the specific membrane protein.
What is the substance that gives soil a blackish to brownish appearance?
A. Iron oxide B. Salts C. Clay minerals D. Organic matter
One primary environmental condition that determines the success of an organism.
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