If the age-specific fertility rate is such that 100 females of age class x would produce 50 offspring, what is the contribution of age class x to the overall population growth rate?
A. 50
B. 2
C. 0.5
D. 0.75
E. cannot be calculated with this information.
Answer: E
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The uneven distribution of an impermeable solute on either side of a membrane will result in
A. osmosis. B. root pressure. C. an increase in oxygen deprivation. D. proton pumping. E. stomatal closing.
In a healthy cell, the rate of DNA repair is equal to the rate of DNA mutation. When the rate of repair lags behind the rate of mutation, what is a possible fate of the cell?
A) The cell can be transformed to a cancerous cell. B) RNA may be used instead of DNA as inheritance material. C) The cell will become embryonic. D) DNA synthesis will continue by a new mechanism.
The most radiosensitive macromolecule is _____.
a) protein b) DNA c) mRNA d) tRNA
An 85-year-old female in a long-term care facility is prescribed verapamil for blood pressure management twice daily. The medication is classified as a calcium channel blocker. As the RN, you are familiar with the action of calcium channel blockers. By inhibiting the passage of calcium through ion channels, the drug targets which of the following processes?
A. diffusion B. active transport C. passive transport D. osmosis