If urine is the waste product in the bladder that is excreted by the urinary system, then urine is a product of what organ of the body that is excreted by the urinary system? Answer choices: - bowel - epidermal - bladder - alveoli - lungs - urine - mammals - NaCl
bladder
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If trout have a centralized nervous system with a brain, then what has a centralized nervous system with a brain? Answer choices: - Birds - pan - virus - sharks - Man - trout - leech - parasite
trout
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If sharpening an item causes that item to change shape, then what does sharpening an item do? Answer choices: - changes shape - alters smell - changes color - Relieve pain - focusing a lens - maintains shape - duplicate itself - lowered energy cost
changes shape
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If expandable stems help many cacti survive in dry environments, then what feature of many cacti help them survive in dry environments? Answer choices: - exoskeleton - Spines for hunting - Expandable stems - an external framework - cactuses - Cooling pipes - genetic diversity - Loud organ pipes
Expandable stems
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