Question: If tree squirrels generate heat mainly by keeping their metabolic rate high, then what generate heat mainly by keeping their metabolic rate high? Answer choices: - elephants - fur seals - bacteria - alpacas - tree squirrels - animals - batteries - the Sun
Answer: tree squirrels

Question: If acatalyst can lower the energy cost of a chemical reaction, then in what way does a catalyst help in chemical reactions? Answer choices: - Generating heat - lowered energy cost - metabolic reaction - heating liquids - by making heat - adding heat - increases a body's strength - preventing heat transfer
Answer: lowered energy cost

Question: If populations need for food can lead to displays of aggression, then populations need for food can lead to what? Answer choices: - agriculture - rapid expansion - drinking - death and devastation - sadness - displays of aggression - massive damage - sorrow
Answer:
displays of aggression