Steroid hormones act by
a. interacting with a target cell's DNA.
b. activating mitochondria in target cells.
c. acting on ribosomes for protein synthesis.
d. stimulating mitosis.
e. helping glucose into the target cell.
A
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Species turnover on islands has been observed to be low. What does this suggest about process in the equilibrium model of island biogeography?
A. Facilitation is of minor importance to this model. B. Secondary succession rarely succeeds. C. Succession on most islands is a fairly orderly process. D. The intermediate disturbance hypothesis can explain colonization rates. E. Immigration of new species often can not keep up with extinction.
The PCR technique doubles the amount of DNA in a sample in each cycle. If you started the PCR technique with two fragments of double-stranded DNA, calculate how many double-stranded DNA fragments you would you have after four cycles.
A. 16 B. 64 C. 32 D. 8
Of the following cancer stages, which one has the greatest potential for a positive outcome, including successful remission?
A. stage 2B breast cancer B. stage 3C breast cancer C. stage 1B breast cancer D. stage 1A breast cancer E. stage 4 breast cancer
How do inpatients differ from outpatients?
A) Inpatients have internal pain, whereas outpatients have outside wounds. B) Inpatients are admitted to a hospital for at least one night. C) Inpatients cannot wait for a doctor patiently. D) Inpatients have an infectious disease.