If chloroplasts manufacture nitrogen, then what is produced by chloroplasts? Answer choices: - oxygen - sunlight - blood - Energy - glucose - gasoline - Energy. - nitrogen
nitrogen
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If birds sing to defend territories and for courtship, then how do birds court and defend territories? Answer choices: - Summer - sound - ligt - singing - mechanical - movement - exercise - autumn
singing
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If viruses are so small that they can be seen by focusing a lens, then viruses are so small that they can be seen by what? Answer choices: - focusing a lens - A computer - looking close - rays or beams - sunlight - bending light rays - seeing smaller - tuning eyes
focusing a lens
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If most salamanders use olfaction to find a mate, then what do most salamanders use to find a mate? Answer choices: - olfaction - sound - seduction - fur and fat - heat energy - air - environment - water
olfaction
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