Which term refers to the movement of a substance from an area of low concentration to an area of high concentration using energy obtained from ATP?
a. passive transport
b. facilitated transport
c. active transport
d. osmosis
Ans: c. active transport
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Which of the following statements about patterns of energy use among countries is false?
A. Individuals in larger countries use more energy than individuals in smaller countries. B. Individuals in high-latitude countries use more energy than individuals in equatorial countries in part because of the need to heat buildings. C. Countries where individuals travel more frequently have higher levels of energy use than countries where individuals travel less frequently. D. Individuals in countries with higher standards of living use more energy than countries with lower standards of living. E. Energy use is distributed unevenly among countries.
What is false about sea stars?
a. they cannot regenerate. b. broadcast spawning is common. c. asexual reproduction is common. d. tube feet are located on the oral surface. e. stomach is everted to digest its prey.
Which of these molecules is typically double-stranded?
A. mRNA B. rRNA C. tRNA D. DNA
Which of the following involves a subjective judgment?
a. A fact b. A theory c. An hypothesis d. An opinion e. A control