Population genetics is the study of:
a. the relationship between natural selection and genetics.
b. the phenotype expression of a population.
c. all the alleles in a given population of organisms.
d. the presence of analogous structures across different species.
c. all the alleles in a given population of organisms.
Population genetics is the study of all the alleles in a given population of organisms, examining the genetic drivers behind phenotypic change.
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The research team used their experiments to study the incorporation of labeled nucleotides into a culture of lymphocytes and found that the lymphocytes incorporated the labeled nucleotide at a significantly higher level after a pathogen was introduced
into the culture. They concluded that _____. A) the presence of the pathogen made the experiments too contaminated to trust the results B) their tissue culture methods needed to be relearned C) infection causes lymphocytes to divide more rapidly D) infection causes cell cultures in general to reproduce more rapidly E) infection causes lymphocyte cultures to skip some parts of the cell cycle
Analyses of sulfur isotopes have been used as evidence against life on the Moon, because the sulfides in lunar rocks have
A) an isotope composition similar to marine sulfate, which is enriched in 34S. B) an isotope composition similar to marine mud, which is depleted in 34S. C) an isotope composition similar to igneous rocks. D) exactly equal amounts of 34S and 32S.
Which of the following is not a function of skeletal muscles?
A. movement of bones B. support C. protection of internal organs D. pumping of blood throughout the body E. maintenance of body temperature
Which of the following is the smallest unit of an element that still retains the properties of the element?
A) the electron B) the cell C) the atom D) zthe molecule E) the proton