Food and Energy in Organisms

What is the main reason all organisms need food?

• To breathe

• To reproduce

• To obtain energy and building materials for growth

• To move

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How does food help an organism grow?

• By making it warmer

• By supplying oxygen

• By providing materials for building cells and tissues

• By keeping it hydrated

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3. Which of the following is a source of energy in food?

• Water

• Proteins

• Vitamins

• Sunlight

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What part of food is primarily used for energy?

• A. Fiber

• B. Carbohydrates

• C. Minerals

• D. Water

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Which part of the cell uses food to release energy?

• A. Nucleus

• B. Vacuole

• C. Mitochondria

• D. Ribosome

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6. Why do plants need food if they make it themselves?

• To absorb water

• To survive in the dark

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Which of the following is a building block organisms use from food to build cells and body parts?

• Proteins

• Carbon dioxide

• Oxygen

• Heat

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What process do plants use to make their own food?

• Respiration

• Photosynthesis

• Digestion

• Fermentation

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What is the main product of photosynthesis that provides energy for the plant?

• Oxygen

• Water

• Glucose (sugar)

• Carbon dioxide

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Animals get energy by:

• Absorbing sunlight

• Eating food and breaking it down

• Producing their own sugar

• Taking in carbon dioxide

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