Urine is the liquid waste product of the body that is excreted by the urinary system, and liquid waste is put into the bladder. Given these facts, urine is a product of what organ of the body that is excreted by the urinary system among the following options: - bowel - epidermal - bladder - alveoli - lungs - urine - mammals - NaCl
bladder
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Fish have a centralized nervous system with a brain, and fish include trout and other fish. Given these facts, what has a centralized nervous system with a brain among the following options: - Birds - pan - virus - sharks - Man - trout - leech - parasite
trout
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Sharpening an object causes that object to change shape, and an object is an item in the real world. Given these facts, what does sharpening an item do among the following options: - changes shape - alters smell - changes color - Relieve pain - focusing a lens - maintains shape - duplicate itself - lowered energy cost
changes shape
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Conserving water can be used for survival in a dry environment, and many cacti have corrugated stems which can expand quickly if water becomes available. Given these facts, what feature of many cacti help them survive in dry environments among the following options: - exoskeleton - Spines for hunting - Expandable stems - an external framework - cactuses - Cooling pipes - genetic diversity - Loud organ pipes
Expandable stems
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