Unit 4 Test: Plants

What is the main source of energy or photosynthesis?

• Carbon dioxide

• Sunlight

• Water

• Oxygen

Which pigment absorbs light energy to make food?

• Glucose

• Starch

• Chlorophyll

• Xylem

Which substances are needed for photosynthesis?

• Oxygen and starch

• Water and carbon dioxide

• Minerals and proteins

• Glucose and chlorophyll

What is the main product of photosynthesis?

• Oxygen

• Carbon dioxide

• Glucose

• Water

Oxygen is released during photosynthesis by:

• Diffusion

• Osmosis

• Active transport

• Respiration

What happens to glucose produced in photosynthesis?

• Converted into starch and stored

• Released as oxygen

• Absorbed by roots

• Turned into carbon dioxide

Carbon dioxide enters the leaf through:

• Xylem

• Phloem

• Stomata

• Sepals

Photosynthesis is important because plants:

• Produce nitrogen

• Release oxygen into the atmosphere

• Absorb minerals

• Create flowers

Plants help reduce which gas in the atmosphere?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

Which of the following is the correct equation for photosynthesis?

• Water + Oxygen → Glucose + Sunlight

• Glucose + Oxygen → Carbon dioxide + Water

• Water + Carbon dioxide + Sunlight → Glucose + Oxygen

• Oxygen + Nitrogen → Glucose + Water