Because archaeons lack peptidoglycan in their cell walls
A. some have an outer layer of complex polysaccharide.
B. they must always be grown in isotonic medium.
C. some have an outer layer of protein.
D. some have an outer layer of complex polysaccharide and some have an outer layer of protein.
Answer: D
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The oily secretion that lubricates the hair follicles of the skin is
A. sebum. B. eczema. C. suder. D. acne.
In a hypothetical land ecosystem, plants (the primary producers) capture 1000 kilocalories of sunlight energy per
square meter per year. Approximately how many kilocalories of the plant’s energy will be harvested by the third trophic
a. 1 b. 10 c. 100 d. 1000 e. 2000
Shallow water above the continental shelves is the:
1.Benthic region
2.Coastal zone
3.Neritic zone
4.Open ocean
5.Pelagic zone
A mushroom is the fleshy, spore bearing reproductive structure of some fungi.
a. true b. false