Input: Answer this question:
A crop of corn plants is genetically modified so that the plants produce a natural pesticide. People are concerned that these corn plants might transfer modified genetic material to other plants. Which of the following is the best way to further modify the plants to prevent them from transferring their genetic materials to other plants?
OPTIONS:
- changing the plants so they do not make pollen
- changing the plants so they do not harm insects
- changing the plants so they cannot produce nutrients
- changing the plants so they cannot be easily identified
Answer: changing the plants so they do not make pollen
Input: Answer this question:
Which of the following is most responsible for the decay of dead organisms?
OPTIONS:
- water
- mammals
- microorganisms
- nitrogen
Answer: microorganisms
Input: Answer this question:
Rhea is a moon of Saturn. Which of these facts about Rhea best indicates that it does not have a water cycle in which water changes state?
OPTIONS:
- Its radius is 765 km.
- Its density is about 1.3 kg/m3.
- Its period of rotation is about 4.5 Earth days.
- Its temperature is between -174C and -220C.
Answer: Its temperature is between -174C and -220C.
Input: Answer this question:
Researchers recently discovered a gene in humans that previously was unknown to science. Which statement best explains why the gene probably was not discovered much sooner?
OPTIONS:
- The gene only recently evolved in humans.
- The technology used to study genes is still being developed.
- Scientists were not interested in genes until a few years ago.
- Scientists were sure they had already discovered every possible gene.
Answer:
The technology used to study genes is still being developed.