The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a ________ of energy to break hydrogen bonds. The energy is ________ from heat produced by your body, thus helping to lower the surface temperature of your body.
A. input; released
B. release; obtained
C. input; obtained
D. release; released
Answer: C
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The centrosome is associated with which class of cytoskeletal filaments?
A. microfilaments B. intermediate filaments C. microtubules D. Answers a and b are correct.
Which bases are found in RNA?
a. adenine and uracil only b. adenine, thymine, and cytosine only c. adenine, uracil, and cytosine only d. adenine, uracil, guanine, and cytosine e. adenine, thymine, guanine, and cytosine
If a mutation occurred, causing the daughter of two pygmies to grow taller than usual, this daughter would likely reproduce at an even earlier age than her parents did.
a. true b. false
Answer the following questions true (T) or false (F)
1. The job of an ecologist is to preserve the natural world. 2. All the members of a single species of frog in a particular pond would be an example of a population. 3. A community of organisms and the physical environment with which they interact is an ecosystem.