The liver releases glucose into the bloodstream if you don't eat for a long time. This represents an example of a characteristic possessed by all living things. Which is it?

A) being composed of cells
B) maintaining a relatively constant internal environment
C) possessing an inherited information base
D) being able to reproduce


Answer: B

Biology & Microbiology

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Most pathogens that gain access through the uninjured skin

A) Just infect the blood below the skin. B) Penetrate a cut or puncture. C) Must be injected. D) Enter through hair follicles and sweat ducts on the skin. E) Must be carried by a parasite to allow them to penetrate.

Biology & Microbiology

In terms of the evolution of nervous systems, which events tend to occur in concert with one another?

A. Brains; radial symmetry B. Planaria; radial symmetry C. Nerve net; bilateral symmetry D. Cephalization; bilateral symmetry E. Cephalization; radial symmetry

Biology & Microbiology

A given medium can be either selective or differential but not both.

Answer the following statement true (T) or false (F)

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Treponema, Borrelia, and Leptospira are all

A. spirochetes. B. obligate parasites requiring host cells. C. transmitted by arthropod vectors. D. bacteria without cell walls. E. curved rods.

Biology & Microbiology