Scientists digging in a cave found an unknown substance. The scientists found that the substance’s molecules were moving around each other. The scientists increased the speed of the substance’s molecules and caused a phase change. How did the scientists do this, and how did this affect the substance?
The scientists transferred energy . . .
a
into the substance, and the substance changed into a gas.
b
into the substance, and the substance changed into a liquid.
c
out of the substance, and the substance changed into a solid.
d
out of the substance, and the substance changed into a liquid.
Answers: 3
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The diagram illustrates the activity of vesicles during a cellular process.
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Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.
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