Ques: Q: The ordovician-silurian extinction event is the first recorded mass extinction and the second largest. during this period, about what percent of marine species went extinct? Choices: - 10 percent - 99 percent - 40 percent - 85 percent A:
Ans: 85 percent

Ques: Q: The tendency of an object to resist a change in its motion is called what? Choices: - isolation - kenetic force - stabilization - inertia A:
Ans: inertia

Ques: Q: What is the term for daily cycles of behavior, like the sleep-wake cycle? Choices: - daily rhythms - variable rhythms - behavioral rhythms - circadian rhythms A:
Ans: circadian rhythms

Ques: Q: What are living things that obtain glucose by eating self feeders called? Choices: - producers - chimeras - viruses - heterotrophs A:
Ans:
heterotrophs