The amount of life that an ecosystem can support is determined primarily by the
A) number of producers and their efficiency.
B) number of heterotrophs.
C) efficiency of the consumers.
D) number of chemoautotrophs.
E) efficiency of the heterotrophs.
A
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Parasitism is often a ____________ factor affecting populations.
A. density-independent B. density-dependent C. inverse density-dependent D. cyclic E. random
________ are enzymes able to convert a substrate to its mirror image
Fill in the blank with correct word.
Which one of the following terms is sometimes called "cell eating"?
A. pinocytosis B. phagocytosis C. exocytosis D. plasmolysis
Symptoms of influenza include
A. fever, myalgia, sore throat, cough, nasal discharge. B. nasal discharge, mild fever, and absence of cough. C. fever, diarrhea, vomiting. D. fever and pneumonia. E. fever, sore throat, rash, cough.