In lakes, the open-water surface layer is called the ____.
A. benthic zone
B. abyssal zone
C. limnetic zone
D. littoral zone
E. profundal zone
Answer: C
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If all of the collagen were removed from a bone, how would the properties of that bone be altered?
A. The bone would be more brittle and easier to break. B. The bone would be more flexible. C. The bone would be harder to break. D. The bone would be more flexible and harder to break. E. The bone would be indistinguishable from cartilage.
Amniocentesis poses increased risks to the fetus and mother
a. True b. False Indicate whether the statement is true or false
Why is potassium deficiency in plants most common on light, sandy soils?
A. plants grown in sandy soil don't require potassium B. potassium ions are too tightly bound to sand particles to be used by plants C. roots grown in sandy soil can't absorb potassium D. percolation of water through sandy soils leaches potassium from the soil
Un-branched polymers built from the same set of 20 amino acids is a _____________.
Fill in the blank(s) with the appropriate word(s).