You are presented with the question "What do Echinoderms lack?" and the following answer choices: - Lungs - Mass - oxygen - eardrum - gills - ovaries - Organs - Bodies Now knowing that echinoderms lack respiratory and excretory systems and lung mechanics and gas exchange are topics during study of the respiratory system, choose the best answer.
Lungs
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You are presented with the question "landfills have a negative impact on what" and the following answer choices: - Life - Clouds - plants - Earth - Fuel - biome - humans - Sunshine Now knowing that landfills have a negative impact on the environment and life affects environment, environment affects life, choose the best answer.
Life
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You are presented with the question "killing microorganisms in food is important to" and the following answer choices: - humans - crop yeilds - food safety - health - Cooking - Animal survival - recipe requirements - farm production Now knowing that irradiating food can be used to kill existing microorganisms in the food and food irradiation offers a solution for addressing the growing concerns associated with food safety, choose the best answer.
food safety
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You are presented with the question "what happens to copper if exposed to heat?" and the following answer choices: - contamination - produces electricity - It expands - becomes hot - they bend - becomes cold - vibrates - anemia Now knowing that if a thermal conductor is exposed to a source of heat then that conductor may become hot and copper is a great thermal conductor, choose the best answer.
becomes hot
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