Effects of Indigenous Microbes
What will be an ideal response?
•Normally play a protective role: native colonization deters the growth of disease-causing microbes - how?
•Occupation of adhesion sites
•Production of antagonistic substances
•Lower pH helps prevent STD microbes.
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•Nutrient utilization - intestinal microbiota nutrient consumption prevents C. difficile colonization.
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Cells that have a crawling movement include (select all correct choices):
A. amoebas foraging for food. B. white blood cells in pursuit of invading pathogens. C. migrating embryonic cells. D. nerve cells transporting neurotransmitters. E. contracting muscle cells.
The reason Darwin sailed aboard the H.M.S. Beagle was because he ____
a. wanted to develop his theory of evolution b. was invited to be the ship's naturalist c. was invited to be the ship's geologist d. was invited to be the captain's dining companion e. was invited to be the captain's personal physician
Why must sea otters consume 25% of their body weight in food every day?
What will be an ideal response?
A person who produces anti-A and anti-B serum antibodies will have blood type ________.
A. B B. O C. AB D. A E. Rh