Chapter 8 - Photosynthesis

What is the primary function of photosynthesis in living organisms?

• To convert chemical energy into solar energy

• To convert solar energy into chemical energy

• To produce oxygen from carbon dioxide

• To break down carbohydrates into energy

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Match the following substances with their roles in photosynthesis.

• Not directly involved in photosynthesis

• Carbon dioxide

• Primary product of photosynthesis

• Carbohydrates

• Used in the Calvin cycle to produce glucose

• Nitrogen

• Source of electrons and protons in light reactions

• Water

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What do all living organisms on Earth have in common regarding energy?

• They produce energy from nitrogen

• They rely on photosynthesis for energy

• They require energy to function

• They do not need energy

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What is an autotroph?

• An organism that cannot produce its own food

• An organism that relies on other organisms for food

• An organism that can produce its own food

• An organism that only consumes meat

What do photoautotrophs use to synthesize chemical energy?

• Water and minerals

• Sunlight and carbon dioxide

• Oxygen and nitrogen

• Proteins and lipids

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Match the following Greek roots with their meanings.

• "Auto"

• "Plant" (phyto)

• "Hetero"

• "Other" (hetero)

• "Phyto"

• "Light" (photo)

• "Photo"

• "Self" (auto)

Which of the following is an example of a heterotroph?

• Algae

• Plants

• Deer

• Cyanobacteria

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What are the starting reactants required for photosynthesis?

• Oxygen, glucose, and sunlight

• Sunlight, carbon dioxide, and water

• Water, oxygen, and glucose

• Carbon dioxide, glucose, and oxygen

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What is the main carbohydrate molecule produced directly from photosynthesis?

• Starch

• Cellulose

• Glucose

• Fructose

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Match the following processes with their contributions to the food chain.

• Role of photosynthesis in thermal regulation

• It generates heat for the environment

• Role of photosynthesis in water production

• It creates energy stored in carbohydrate molecules

• Role of photosynthesis in providing essential gases

• It produces water for plants

• Role of photosynthesis in energy storage

• It provides oxygen for animals to breathe

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