The change in frequency of traits in a population is known as _____________
Fill in the blank(s) with the appropriate word(s).
Answer: natural selection
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When a potassium ion (K+) moves from the soil into the vacuole of a cell on the surface of a root, it must pass through several cellular structures. Which of the following correctly describes the order in which these structures will be encountered by the
ion? A) plasma membrane ? primary cell wall ? cytoplasm ? vacuole B) secondary cell wall ? plasma membrane ? primary cell wall ? cytoplasm ? vacuole C) primary cell wall ? plasma membrane ? cytoplasm ? vacuole D) primary cell wall ? plasma membrane ? lysosome ? cytoplasm ? vacuole E) primary cell wall ? plasma membrane ? cytoplasm ? secondary cell wall ? vacuole
Chemical subunits called amino acids combine to make ____________________. Fill in the blank(s) with the appropriate word(s)
Microorganisms are currently being used to soften denim in "stonewashed" blue jeans. This example of manipulating microorganisms to make products useful for industrial processes is called
A) epidemiology. B) food microbiology. C) bioremediation. D) biotechnology.
Photoautotrophs use light energy directly for ________.
A. both the production of ATP and NADPH and the reduction of carbon dioxide to glucose B. neither the production of ATP and NADPH nor the reduction of carbon dioxide to glucose C. the production of ATP and NADPH D. the reduction of carbon dioxide to glucose