A flood that washes away an entire population of rabbits is a(n) ____
a. density-dependent factor
b. intrinsic limiting factor
c. density-independent factor
d. consequence of exponential growth
e. example of a population reaching its carrying capacity
ANSWER: c
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Two weeks following a hiking trip in which several ticks were noticed and numerous mosquitoes were biting, a 25-year-old man notices a rash shaped like a red ring on the back of his thigh. He was not concerned because he had no other symptoms. Three months later he noticed significant pain in his elbows and his knees. What is the most likely cause of his illness?
A. Ehrlichiosis B. Rocky Mountain Spotted Fever C. West Nile encephalitis D. Lyme disease
What is a transgenic organism?
a. an organism with multiple copies of the same gene b. an organism that has genes from another species c. an organism that does not use DNA to specify proteins d. an organism that has had its entire genome sequenced e. an organism that has been DNA profiled
The ability to extract oxygen from the environment and use it to make energy is called
A) photosynthesis. B) comparative biochemistry. C) anaerobic metabolism. D) self-replication. E) aerobic metabolism.
Tapeworms are similar to fungi in that they
A) have cell walls made of chitin. B) are sessile autotrophs. C) feed by absorption. D) inhabit marine, damp terrestrial, and freshwater habitats.