Which of these is a symptom of vitamin A deficiency?

A) anemia
B) severe combined immunodeficiency disease (SCID)
C) diabetes
D) blindness
E) blood doping


D) blindness

Biology & Microbiology

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Which high energy light wave length can penetrate sea water the deepest?

a. Blue b. Green c. Violet d. Red e. a, b, and c above

Biology & Microbiology

When ____ reaches the stomach, it is inactivated by the low pH

a. pepsin b. pepsinogen c. trypsin d. amylase e. bile

Biology & Microbiology

Which of the following series correctly represents the hierarchical organization within ecology?

a. ecosystem ? population ? community ? biosphere b. biosphere ? community ? population ? ecosystem c. community ? population ? ecosystem ? biosphere d. population ? community ? ecosystem ? biosphere e. population ? ecosystem ? community ? biosphere

Biology & Microbiology

Pheromones affect only the animal that produces them

Indicate whether the statement is true or false

Biology & Microbiology