All bacteria are pathogenic.

a. true
b. false


Answer: b. false

Biology & Microbiology

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An embryo develops rudiments of all organs by week ________ of prenatal development.

A) 8 B) 4 C) 6 D) 3

Biology & Microbiology

In frogs, formation of the eye lens is induced by chemical signals from

A) cells that will become the neural plate. B) cells that are forming the inner ear. C) an outgrowth of the developing brain. D) both A and B E) both A and C

Biology & Microbiology

Which of the following would be true of an epithelium specialized for exchange by diffusion (e.g., a respiratory epithelium)?

A. thin with a relatively large surface area B. thick with a relatively large surface area C. thin with a relatively small surface area D. thick with a relatively small surface area E. thin with a small surface area/volume ratio

Biology & Microbiology

What is the primary cause of allopatric speciation?

a. Geographic separations b. Chromosomal abnormalities c. Limited natural resources d. Microevolution factors

Biology & Microbiology