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
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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.
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
A given medium can be either selective or differential but not both.
Answer the following statement true (T) or false (F)
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.