Organisms that live in and around hydrothermal vents at the bottom of the ocean are:

A) acidophilic, psychrophilic, and halophilic.
B) halophilic, alkaliphilic, and psychrophilic.
C) halophilic, psychrophilic, and barophilic.
D) halophilic, thermophilic, and barophilic.


D) halophilic, thermophilic, and barophilic.

Biology & Microbiology

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Ribosomes are ____

a. membrane-enclosed organelles b. attached to the smooth endoplasmic reticulum c. involved in polypeptide transport

d. required for DNA synthesis e. involved in polypeptide synthesis

Biology & Microbiology

The smallest biological unit that can evolve is the ______.

a. phylum b. population c. individual d. species

Biology & Microbiology

When a mosquito bites a person and infects the person with malaria, the mosquito is serving as a(n) ___________

A. Airborne B. Vehicle-borne C. Direct D. Vector

Biology & Microbiology

Communities with a high level of bacterial diversity are found in many habitats including soil and aquatic environments. Recent studies indicate this diversity is crucial to the functioning of these communities. The same studies have also found that phage abundance plays a critical role in the maintenance of the bacterial diversity within these communities. Are phages a density-dependent or a density-independent regulating factor?

A. density-independent B. density-dependent

Biology & Microbiology