Excretion in Plants_Unsolved Paper
Chapter: Life Processes | Topic: Excretion in Plants
EXCRETION IN PLANTS_UNSOLVED PAPER
Topic: Excretion in Plants
Q1.Which process helps plants remove excess water in the form of water vapour?
- Photosynthesis
- Respiration
- Transpiration
- Germination
Q2.Oxygen produced during photosynthesis is mainly released through:
- Root hairs
- Xylem
- Stomata
- Phloem
Q3.Which of the following is a waste product of respiration in plants?
- Oxygen
- Carbon dioxide
- Glucose
- Starch
Q4.Some waste substances in plants are stored safely in:
- Flowers only
- Leaves, bark, and old stems
- Root hairs only
- Fruits only
Q5.A gardener notices that old leaves of a tree fall regularly. Which statement best explains how this helps the plant?
- It increases photosynthesis immediately.
- It helps remove certain stored waste substances.
- It increases water absorption.
- It reduces seed production.
Q6.Which opening in leaves helps in the exchange of gases and removal of water vapour?
- Lenticels
- Stomata
- Villi
- Nephrons
Short questions
Q1.Why do plants not require a specialized excretory system like humans?
Q2. State any two ways by which plants remove their waste products.
Q3.What is the role of stomata in plant excretion?
Q4. A student observes that a tree sheds many leaves during a particular season. Explain how this process is related to excretion in plants.
Q5. How do plants store harmful waste substances without damaging their living cells?
Q6. Explain the role of transpiration in the removal of excess water from plants.
Q1.Describe the different methods by which plants remove waste products. Include the roles of stomata, lenticels, storage tissues, and leaf fall.
Q2.Explain how plants manage the waste products formed during:
Photosynthesis
Respiration
Metabolism
Discuss how these waste materials are removed or stored safely.
Q3.A farmer regularly removes dry leaves and dead bark from fruit trees. Explain how these plant parts are connected with the excretion process and why this practice is beneficial for healthy plant growth.
Q1. Read the following case:
A science teacher places a healthy potted plant under a transparent plastic cover for a few hours. Tiny water droplets appear on the inner surface of the cover.
Based on your understanding of plant excretion:
Identify the process responsible for the formation of water droplets.
Explain how this process takes place.
Discuss its importance in maintaining the health of the plant.
Q2. A biology student prepared the following flow chart:
Photosynthesis → Oxygen Produced → Release Through Leaves
Respiration → Carbon Dioxide Produced → Release Through Plant Surface
Using this flow chart, explain how plants remove gaseous waste products formed during different life processes.
Q3. Read the following observations:
Some waste substances are stored in old leaves and bark.
Water vapour escapes from leaves.
Gaseous wastes move through tiny openings in plants.
Certain wastes remain stored as resins, gums, or crystals.
Using these observations, explain how different methods of excretion help plants survive and maintain internal balance.