Which of the following describe source-sink metapopulations?
_____ Sink populations near source populations are less likely to go extinct.
_____ Sink populations without access to immigrants from source populations are less likely to go extinct.
_____ Source populations usually occupy better habitats.
_____ Source populations are less likely to go extinct.
_____ The emigration rate from source populations exceeds that from sink populations.
__X__ Sink populations near source populations are less likely to go extinct.
_____ Sink populations without access to immigrants from source populations are less likely to go extinct.
__X__ Source populations usually occupy better habitats.
__X__ Source populations are less likely to go extinct.
__X__ The emigration rate from source populations exceeds that from sink populations.
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In designing a drug to inhibit pox viruses, the compound should localize in the host's ________ to be MOST effective
A) nucleus B) endoplasmic reticulum C) cytoplasm D) Golgi complex
Which mutation is an example of an adaptation?
a. A mutation results in decreased sperm count in humans. b. A mutation is found to be the cause of Alzheimer's Disease. c. A mutation results in hairless cats, reducing allergies in humans. d. A mutation increases the size of tomato plants. e. A mutation renders an individual immune to HIV infection.
The central function of X-inactivation is
A) silencing imprinted genes. B) enhancing the expression of genes on the chromosome left active. C) dosage compensation. D) silencing deleterious alleles. E) None of these
The modern synthesis was a fusion of ______.
a. genetics and evolutionary biology b. population ecology and genetics c. molecular biology and comparative anatomy d. the fossil record and genetics