Q: You are presented with the question "What requires burning fossil fuels?" and the following answer choices: - Fuel cells - using electricity - animals - Cooking - organisms - engines - lightning - solar power Now knowing that using a gasoline engine requires burning gasoline and oil and gasoline are fossil fuels, choose the best answer.
A: engines

Q: You are presented with the question "What do animals find protection from when using rock overhangs?" and the following answer choices: - sun's heat - insects - weather - erosion - rivers - bats - wind - the sun Now knowing that shelter is used for protection by animals against weather and caves or rock overhangs provide shelter, choose the best answer.
A: weather

Q: You are presented with the question "Damage to the structural units of the kidneys can be caused by .." and the following answer choices: - harmful substances - an area swollen with pus - a lot of human deaths - Pesticides - Heavy rains - Leptospirosis - Veins and arteries. - high blood pressure Now knowing that nephrons are the structural and functional units of the kidneys and damage to the nephrons can be caused by conditions such as diabetes and high blood pressure , choose the best answer.
A: high blood pressure

Q: You are presented with the question "What is the major thing that biological membranes consist of?" and the following answer choices: - chemicals - glucose - lipids - Energy - complex - oxygen - matter - an ion Now knowing that lipids may consist of fatty acids alone, or they may contain other molecules as well and all biological membranes contain lipids as the major constituent, choose the best answer.
A: lipids