Which of the following is TRUE of cystic fibrosis?

a. It results in reduced mucus production.
b. It leads to increased bacterial lung infections.
c. It affects the amino acid alanine.
d. It causes excess water to leave the cells.
e. It most often affects the liver.


ANSWER: b

Biology & Microbiology

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Examples of animals already extinct, or facing extinction as a direct result of deliberate efforts to

exterminate them because of their perceived harm to economically useful species, include:a. cheetahs and rhinos. b. passenger pigeons and cheetahs. c. prairie dogs and rhinos. d. rhinos and macaws. e. mountain lions and wolves.

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The evolution of a host race is due to the reproductive isolating mechanism called ____ isolation

a. behavioral b. temporal c. mechanical d. gametic e. ecological

Biology & Microbiology

Salivary amylase begins the breakdown of what substance?

a. amino acids b. lipids c. starch d. protein

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This simple plant tissue consists of dead cells

with thick, lignified cell walls that function in support. This plant tissue is

a. parenchyma. b. sclerenchyma. c. collenchyma. d. xylem. e. phloem

Biology & Microbiology