A survivorship curve is a graph that plots
A) an individual's likelihood of reproducing as a function of age.
B) an individual's likelihood of being alive as a function of age.
C) the effect of predation on a prey population.
D) population growth that is limited by a carrying capacity.
Answer: B
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Lupins are an angiosperm genus having "cluster roots," which are roots that have high metabolic rates and exude large quantities of organic acids to the soil. What purpose might exuding organic acids serve?
A. It provides energy for free-living soil microbes. B. It provides energy for symbiotic microbes. C. It raises soil pH to liberate tightly bound minerals. D. It lowers soil pH to liberate tightly bound minerals.
When copies of a gene are found at different locations on the same or different chromosomes, the phenomenon is
called _____.
a. dispersed duplication b. dispersed localization c. duplicate localization d. gene dispersion e. random dispersion
Select the best choice for the following statements in reference to the classes listed below.
A. Members of this class have cartilaginous skeletons but also possess jaws. B. Members of one unusual group may have been ancestors of tetrapods. C. Members of this class are fully terrestrial except for reproduction. D. Some species of this class live in water but are not dependent upon an aquatic environment.
Which strategies would a seawater fish with an internal osmolarity of 320mOsm/L living in a marine environment of 1010mOsm/L utilize to maintain internal ion and water homeostasis?
A. Produce copious amounts of dilute urine. B. Drink seawater and actively transport salts into their bodies at the gills. C. Drink seawater and actively excrete salts out of their bodies across the gills. D. Don't drink seawater and actively transport salts into their bodies at the kidneys. E. All of the choices for this question are correct.