In a series of field experiments, David Tilman and colleagues investigated biodiversity and ecosystem function. They found a relationship between
A. ecosystem diversity and genetic diversity.
B. species diversity and genetic diversity.
C. ecosystem diversity and species richness.
D. species diversity and ecosystem function.
Answer: D
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Over twisting or under twisting of helical DNA generates
A. hypertwists. B. hypercoils. C. supercoils. D. hypotwists.
The approach of using mutagenesis and genetic selection to produce microbes with new degradative capabilities or the ability to produce compounds with new and unique properties is called ________ evolution.
Fill in the blank(s) with the appropriate word(s).
Nearly all eukaryotic cells have mitochondria, but the number varies by the type of cell and by the organism. In general, cells that have the highest demand for energy tend to have:
a. the least mitochondria b. the most mitochondria c. slow dividing mitochondria d. larger mitochondria in lower numbers e. no mitochondria
Golden rice was created to increase the ________ content of rice
A) EPSPS B) polygalacturonase (PG) C) cry D) Ti E) ?-carotene