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Plant Life Processes: 17 MCQs with answers

All 17 multiple-choice questions from this kit, free and with no sign-up.

Full kit · everything Flashcards · 17 Quick Revision · 12

Warm-up · 6 questions

Q1. Which process do green plants use to make their own food?

Beginner
A Photosynthesis B Transpiration C Digestion D Respiration
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Photosynthesis

Photosynthesis is the process by which green plants use sunlight, water, and carbon dioxide to make food.

Q2. Which gas do plants take in from the air during photosynthesis?

Beginner
A Hydrogen B Oxygen C Nitrogen D Carbon dioxide
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Carbon dioxide

Plants absorb carbon dioxide from the air for photosynthesis.

Q3. Which part of the plant mainly absorbs water and minerals from the soil?

Beginner
A Stem B Roots C Flowers D Leaves
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Roots

Roots anchor the plant and absorb water and minerals from the soil.

Q4. Which of these is required for photosynthesis to occur?

Beginner
A Darkness B Sunlight C Soil only D Oxygen only
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Sunlight

Sunlight provides the energy needed for photosynthesis.

Q5. Photosynthesis occurs only in the presence of sunlight.

Beginner
A True B False
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True

Sunlight is essential for photosynthesis; it provides energy to split water and fix carbon dioxide.

Q6. Plants take in oxygen only at night.

Beginner
A True B False
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False

Plants respire all the time, taking in oxygen and releasing carbon dioxide, both day and night.

Building up · 9 questions

Q7. What is the green pigment in leaves that captures sunlight called?

Intermediate
A Melanin B Carotene C Haemoglobin D Chlorophyll
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Chlorophyll

Chlorophyll is the green pigment that absorbs light energy for photosynthesis.

Q8. Which of the following is a product of photosynthesis?

Intermediate
A Carbon dioxide B Water C Nitrogen D Oxygen
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Oxygen

Oxygen is released as a by-product during photosynthesis.

Q9. The process by which plants lose water vapour through small openings in leaves is called:

Intermediate
A Respiration B Absorption C Photosynthesis D Transpiration
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Transpiration

Transpiration is the loss of water vapour from plant leaves through stomata.

Q10. Which tiny openings on the surface of leaves allow gas exchange?

Intermediate
A Xylem B Stomata C Cuticle D Phloem
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Stomata

Stomata are small pores on leaves that allow carbon dioxide to enter and oxygen to exit.

Q11. Which tissue transports water and minerals from roots to other parts of the plant?

Intermediate
A Epidermis B Phloem C Cambium D Xylem
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Xylem

Xylem is the vascular tissue that conducts water and dissolved minerals upward from roots.

Q12. Which tissue transports food prepared in leaves to other parts of the plant?

Intermediate
A Root hair B Stomata C Phloem D Xylem
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Phloem

Phloem transports the food (sugars) made in leaves to storage organs and growing parts.

Q13. Plants respire:

Intermediate
A All the time B Only when they are young C Only at night D Only during the day
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All the time

Respiration in plants occurs continuously, day and night, to release energy from food.

Q14. Which of the following is NOT a life process in plants?

Intermediate
A Photosynthesis B Transpiration C Locomotion D Respiration
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Locomotion

Plants do not move from place to place (locomotion); they are fixed. Photosynthesis, respiration, and transpiration are life processes.

Q15. The food made by plants during photosynthesis is stored mainly as:

Intermediate
A Starch B Fat C Vitamin D Protein
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Starch

Plants convert glucose into starch for storage.

Topper level · 2 questions

Q16. The movement of water through a plant from roots to leaves is mainly due to:

Advanced
A Active transport B Transpiration pull C Root pressure alone D Capillary action only
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Transpiration pull

Transpiration pull, created by water loss from leaves, helps draw water upward through the xylem.

Q17. Which of the following best describes the role of stomata in plants?

Advanced
A They store starch B They transport food C They absorb water from the soil D They regulate gas exchange and water loss
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They regulate gas exchange and water loss

Stomata open and close to control the exchange of gases and the loss of water vapour.

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