Bactericidal drugs slow or stop bacterial metabolism or reproduction, but are not necessarily lethal.

a. true
b. false


Ans: b. false

Biology & Microbiology

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Four of the following were innovations that led to new adaptive zones. Select the exception

a. flight-capable wings in birds b. amniotic eggs in early reptiles c. Galápagos finches evolved to eat differently sized seeds d. sperm cells carried in pollen grains in seed plants e. silk glands in spiders

Biology & Microbiology

Metagenomic studies of prokaryotes have

revealed that

a. there is very little diversity among bacteria. b. archaea are more closely related to bacteria than to eukaryotes. c. bacteria and archaea are essentially the same organisms. d. most archaea evolved from viruses. e. none of these things were revealed by metagenomic studies

Biology & Microbiology

How do we perceive the pitch of sounds?

A) The hammer, anvil, and stirrup vibrate at different speeds. B) Different parts of the basilar membrane vibrate in response to different frequencies of sound. C) Rods vibrate in response to high-frequency sounds and cones respond to low-frequency sounds. D) The tympanic membrane vibrates more strongly at high frequencies. E) The pinna swivels in different directions in response to sounds of different frequency.

Biology & Microbiology

The tradeoffs that underlie antagonistic pleiotropy** are due to negative effects of _______ on survival. **hint: make sure you can define this term

A. predation B. maximum lifespan C. early reproduction D. competition E. population density

Biology & Microbiology