Microbes in our digestive tract that help us digest food demonstrate a ________ association.

a. parasitic
b. pathogenic
c. symbiotic
d. benthic
e. homeopathic


Ans: c. symbiotic

Biology & Microbiology

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The region of brain that coordinates antagonistic muscle movements is the

A) medulla oblongata. B) cerebellum. C) pons. D) thalamus. E) occipital lobe.

Biology & Microbiology

Figure 55-1 represents:


a. a fairly simple food web.
b. a fairly simple food chain.
c. a pyramid of biomass.
d. a pyramid of energy.
e. a pyramid of numbers.

Biology & Microbiology

If different populations of the same species become geographically isolated and evolve reproductive isolation over a period of time, then _______________ has occurred.

A. artificial selection B. extinction C. speciation D. adaptation E. classification

Biology & Microbiology

The polysaccharides agarose and carrageenan are isolated from red algae for commercial use. These polysaccharides are found in cell walls. What plant polysaccharide are they analogous to?

A. Mannose B. elastin C. Cellulose D. Collagen E. Amylose

Biology & Microbiology