The most basic definition of life which takes account of the relative importance of the six fundamental properties of living things is that life is something that can
A) grow and develop
B) respond to environmental changes
C) utilize energy
D) reproduce and evolve through natural selection
Question 2
Consider the same scenario as in the previous problem: Two twin sisters, Gwen and Jackie, are both 20 years old in the year 2020. Jackie takes off on a round-trip to Vega, 25 light-years away. She travels at an average speed of 0.9999c.
Which of the following best describes the situation according to Jackie? A) She stays still, while Earth rushes away from her at 0.9999c and Vega rushes toward her at 0.9999c. Since Vega is 25 light-years away, she says it takes Vega about 25 years to reach her.
B) She says that the 25 light-year trip takes only a few months, and therefore concludes that she is traveling faster than the speed of light.
C) It takes her 25 years to reach Vega.
D) She stays still, while Earth rushes away from her at 0.9999c and Vega rushes toward her at 0.9999c. She sees the distance from Earth to Vega shortened considerably from 25 light-years, and therefore it takes far less than 25 years for Vega to reach her.
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