Photosynthesis Video Review

What is the primary reason plants are crucial in ecosystems?

• They are the main source of water.

• They offer shelter to all animals.

• They provide oxygen through photosynthesis.

• They can move to find sunlight.

What substance do plants produce during photosynthesis that humans need to survive?

• Water

• Oxygen

• Carbon dioxide

• Nitrogen

What is the main purpose of photosynthesis?

• To produce oxygen

• To create glucose

• To absorb carbon dioxide

• Both A and B

Which of the following organisms can also perform photosynthesis besides plants?

• Viruses

• Some protists and bacteria

• All animals

• Fungi

Which of the following is NOT a reactant in the photosynthesis equation?

• Carbon dioxide

• Sunlight

• Water

• Glucose

What is the main pigment used by plants to capture light for photosynthesis?

• Xanthophyll

• Anthocyanin

• Carotene

• Chlorophyll

Why do most plants appear green?

• They only use green light for photosynthesis.

• They reflect green light.

• They emit green light.

• They absorb green light.

What is the significance of chlorophyll reflecting green light?

• It reduces the energy plants receive.

• It increases water absorption.

• It makes plants look green.

• It helps plants absorb more sunlight.

How do plants benefit from having different pigments besides chlorophyll?

• They can grow in complete darkness.

• They can produce more oxygen.

• They can produce more types of sugars.

• They can absorb a wider range of light wavelengths.

Where do the light-dependent reactions of photosynthesis take place?

• In the stroma

• In the mitochondria

• In the thylakoids

• In the ribosomes