Biological diversity is an index of the variety of living organisms in an ecosystem, and includes:a
species richness only.
b. species richness, genetic diversity, and ecosystem diversity.
c. species richness, biosphere diversity, and ecosystem diversity.
d. population diversity and ecosystem diversity.
e. genetic diversity only.
b
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Nitrogen is used in plant cells to produce which of the following?
A. sugars B. proteins and nucleic acids C. proteins D. sugars and nucleic acids E. nucleic acids
The concept of ____ explains why children of parents who are at the extreme ends of a normal (bell-curve)
distribution for a phenotype are usually closer to the population average for the phenotype. a. correlation coefficient b. regression to the mean c. multifactorial differences d. concordance e. epigenetics
One of the societal benefits of genetic engineering today is
A) the production of human proteins by bacteria and yeast for the treatment of human diseases. B) genetically modified humans. C) gene therapy for many human genetic diseases. D) human cloning. E) human cloning and genetically modified humans.
Choose the TRUE statement(s) about animal respiratory systems. (Select all that apply.)
a. Water breathers have to work harder to get oxygen because there is less oxygen in water than air and water is heavy. b. All animals have respiratory systems. c. Unlike air-breathers, water-breathers tend to be the same temperature as their medium, because water has a higher thermal conductivity than air. d. Water-breathers tend to have higher PCO2 levels than air-breathers because it is more challenging for them to exchange gases.