All of the following are correct about biofilms, except
A. they are harmless aggregations of microbes.
B. they play an important role in recycling elements in the Earth.
C. they are cooperative associations among several microbial groups.
D. they can colonize medical devices.
E. an example could be the scum that builds up in toilet bowls.
Answer: A
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What concept proposes that genes associated with altruism are selected for if they lead to behavior that promotes the reproductive success of an altruist's close relatives?
a. natural selection b. inclusive fitness c. altruistic behavior d. social evolution e. instinctive sacrifice
What is a correct description of metaphase during mitosis?
What will be an ideal response?
As a mechanism of evolution, natural selection acts on variants within populations and ultimately leads to the evolution of different species was proposed by
A. Mendel. B. Lyell. C. Darwin. D. Malthus. E. Founder.
The polysaccharide chains of the bacterial cell walls are made of alternating N-_______ and N-_______ acid.
a. acetylgalactose; acetylmuramic b. acetylglucosamine; acetylmuramic c. acetylglucosamine; acetylneuraminic d. acetyl galactose; acetylneuraminic