A spectrophotometer can be used to measure
A. metabolic activity.
B. turbidity.
C. dry weight.
D. pathogenicity.
Ans: B. turbidity.
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Photosynthetic organisms are essential for limiting the damage done by global warming because they
____.
a. move carbon from the atmosphere to living organisms b. move carbon from the soil to the atmosphere c. move carbon from the atmosphere to the soil d. produce oxygen e. sequester carbon in geologic sediments
When you inhale, the diaphragm moves ___
and the intercostal muscles move the rib cage ___.
a. downward...outward b. outward...downward c. outward...outward d. downward...downward e. outward...upward
The basic building blocks of DNA are ____
a. proteins b. fats c. amino acids d. nucleotides e. phosphates and sugars
Monotremes differ from the other mammals in their
A. fur. B. laying of shelled eggs. C. containing a pouch for young to live. D. lack of milk-producing glands. E. carnivorous nature.