In the Ames test, the more mutagenic the test substance, the greater the number of revertant colonies the test plate should show.

A) True
B) False


A) True

Biology & Microbiology

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Root epidermal cells passively transport ions inward from the soil because the ions are unable to follow a

concentration gradient into the cells.

a. True b. False

Biology & Microbiology

Human chromosome banding patterns match most closely those of

A) chimpanzees. B) monkeys. C) gorillas. D) orangutans.

Biology & Microbiology

Competitive exclusion is the result of

a. mutualism. b. commensalism. c. competition. d. predation. e. parasitism.

Biology & Microbiology

Thalassemia is a very serious disorder that affects hemoglobin. It is caused by an autosomal recessive gene. If both a woman and a man are carriers, then what is the chance that they will have a child with the disease?

A) 100% B) 75% C) 50% D) 25%

Biology & Microbiology