Ques:Answer the following question given this paragraph: Ozone near the ground harms human health. But the ozone layer in the stratosphere protects us from solar rays. That's why people were alarmed in the 1980s to learn that there was a hole in the ozone layer. Q: What does ozone in the stratosphere protect us from? Choices: - comets - acid rain - solar traces - solar rays A:

Ans:solar rays
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Ques:Answer the following question given this paragraph: The horizontal motion of a projectile does not influence its free fall. Q: What influence does the horizontal motion of a projectile have on free fall? Choices: - decrease acceleration - vertical - increase acceleration - none A:

Ans:none
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Ques:Answer the following question given this paragraph: Q: What is the first stage of cellular respiration? Choices: - photosynthesis - amniocentesis - hydrolysis - glycolysis A:

Ans:glycolysis
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Ques:Answer the following question given this paragraph: Living chordates are mainly vertebrates. In vertebrates, the notochord develops into a backbone, or vertebral column, after the embryonic stage. A small percentage of chordates are invertebrates. Their notochord never develops into a backbone. Invertebrate chordates include tunicates and lancelets. Both groups of animals are small and relatively primitive. They are probably similar to the earliest chordates that evolved more than 500 million years ago. Q: During the embryonic stage of vertebrates, the notochord develops into what? Choices: - rib cage - umbilical cord - brain stem - backbone A:

Ans:
backbone
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