Which of the following causes of extinction has not been attributed to human activity?
A. habitat loss
B. increased carbon dioxide in the atmosphere
C. eutrophication
D. exotic species
E. All of the above.
Answer: E
Biology & Microbiology
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The virulence of this organism, which causes chancroid, is most likely attributed to:
a. proteases. b. capsular factors. c. hemolysins. d. catalase.
Biology & Microbiology
The cavities inside the brain are termed
A. sinuses. B. ventricles. C. cavities. D. sulci.
Biology & Microbiology
Seed plants
a. have alternation of generations. b. are heterosporous. c. develop a seed coat. d. are all of the above.
Biology & Microbiology
The accompanying figure is a photomicrograph of ____.?
a. a nucleus
b. a Golgi body
c. endoplasmic reticulum
d. a vacuole
e. a nucleoid
Biology & Microbiology