Which substances are the most plentiful biological
molecules in the biosphere?
a. carbohydrates
b. salts and minerals
c. proteins
d. fats
e. nucleic acids
Answer: a
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Which of the following are in order from
primary producer to 4th trophic level? a. grass: coyote: bird: grasshopper b. coyote: bird: grasshopper: grass c. bird: grasshopper: grass: coyote d. grass: grasshopper: bird: coyote e. none of these
Hypo-osmotic body fluids
What will be an ideal response?
The kingdoms included in the Linnaeus system of classification are
A. Animalia and Prokaryotae. B. Protista and Plantae. C. Fungi and Protista. D. Animalia and Plantae. E. Prokaryotae and Protista.
You isolate a pathogenic strain of E. coli from a patient and discover that this E. coli strain is resistant to an antibiotic. Common laboratory strains of E. coli are not resistant to this antibiotic,
nor are any other previously isolated pathogenic E. coli strains. However, such resistance has been observed in other bacteria in the hospital in which the patient was treated. This newly discovered antibiotic resistance in E. coli is most likely due to _______. (a) a mutation within a gene. (b) a mutation within the regulatory DNA of a gene. (c) gene duplication. (d) horizontal gene transfer.