In 2011, more than 85% of the ________ grown in the United States was transgenic
A) cotton (only)
B) corn (only)
C) soybeans (only)
D) corn, cotton, and soybeans
E) corn and soybeans (only)
D
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Nuclear pores have proteins that open and close, controlling flow of cell solutions and molecules in and out of the nuclear envelope (a double-thick membrane). In this, nuclear pores are similar in structure and function to
A. gap junctions. B. cilia. C. cytoskeleton microtubules. D. anchoring junctions. E. vacuoles.
Which feature is shared by euglenoids and
kinetoplastids? a. an eyespot b. a single flagellum c. photoautotrophy d. parasitic existence e. live in marine and freshwater habitats
When light energy hits a photopigment, the molecule
A) is separated from the plasma membrane. B) is destroyed, setting off a series of chemical reactions. C) forms an enzyme. D) changes shape, setting off a series of chemical reactions. E) generates an action potential.
Most carbohydrates manufactured in leaves and other photosynthetic parts are transported through the phloem to the rest of the plant by the process of
A. translocation. B. transpiration. C. turgor pressure. D. osmosis. E. receptor-mediated transport.