The letter "A" in the above figure represents
a. humerus
b. pectoral girdle
c. skull
d. sternum
e. pelvic girdle
E
Biology & Microbiology
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The enzyme nitrogenase is irreversibly inhibited by low concentrations of ____
a. O2 b. NO3- c. N2 d. CO2 e. NH4+
Biology & Microbiology
The main organic product of photosynthesis is
A. glucose. B. carbon dioxide. C. protein. D. triglyceride. E. chlorophyll.
Biology & Microbiology
In humans, the egg provides the mitochondria to the zygote. In plants, which organelles would be provided by the egg and not by the sperm?
A. nuclei and chloroplasts B. chloroplasts and mitochondria C. nuclei D. mitochondria E. chloroplasts
Biology & Microbiology
Select all substances that are known to undergo tubular secretion (from the blood into the tubular fluid).
Biology & Microbiology