Q: Which veins return oxygen-rich blood from the lungs to the heart? Choices: - jugular - varicose - respiratory - pulmonary A:
pulmonary
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Q: What is the term used for a large body of air of the same temperature and moisture conditions? Choices: - air group - sky mass - air pool - air mass A:
air mass
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Q: If environmental conditions deteriorate, many species can form protective what? Choices: - fibers - proteins - shells - cysts A:
cysts
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Q: Plane mirrors work because the light rays create what behind the mirror? Choices: - a mirror image - a entire image - a virtual example - a virtual image A:
a virtual image
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