These organisms often have both a polyp form and a medusa form in their life cycle.
(A) Echinoderms
(B) Annelids
(C) Arthropods
(D) Cnidarians (coelenterates)
(E) Chordates
Answer: (D) Cnidarians (coelenterates)
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Some of the intestinal symptoms elicited by pathogens such as Salmonella, Shigella, and Escherichia are due to the presence of
A) pseudomurein. B) S-layers. C) lipopolysaccharides. D) peptidoglycan.
An individual with a genotype of Aa Bb CC is able to produce how many different kinds of gametes?
a. 2 b. 3 c. 4 d. 7 e. 8
Why would a researcher choose to engineer a synthetic gut microbiome, versus simply performing a fecal transplant?
A. Fecal transplants are not possible. B. More species can be transplanted by engineering. C. Only a single species is responsible for benefits anyway. D. Fecal transplants are too expensive. E. Better control over the levels of helpful and harmful species.
Nitrogen deficiency usually causes plant leaves to turn ___________
Fill in the blank(s) with the appropriate word(s).