The streamlined shape of the dolphin, seal, and other swimming animals is most important for
A. overcoming the forces of gravity acting on the animal.
B. reducing drag from the water they must swim through.
C. maintaining a consistent speed in the dense medium.
D. reducing the mass of the animal's body.
Answer: B
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If a population of termites were treated with a chemical that destroyed all of the trichonymphids living in their gut, what would be the most likely consequence?
A. The termites would die because they would not be able to digest cellulose in wood. B. The individual termites would grow to be much larger. C. The termites would be able reproduce more rapidly and their population would expand. D. The termites would turn to alternative sources of nutrients.
The most common agent(s) causing subacute bacterial endocarditis is/are
A. Streptococcus pyogenes. B. Pseudomonas aeruginosa. C. normal skin or mouth microbiota. D. Escherichia coli.
When the diaphragm is relaxed, it allows air to leave the lungs including the residuals volume.
a. true b. false
An enzyme that cuts double-stranded DNA at specific nucleotide sequences.
A) RNA polymerase B) DNA ligase C) Restriction enzyme D) Transposase