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
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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
Salivary amylase begins the breakdown of what substance?
a. amino acids b. lipids c. starch d. protein
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
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.