Latest Updated CBSE Class 10 Science CH-06 Life Processes
CBSE Class 10 Science Notes Chapter 6 Life Processes
CBSE Class 10 Science Notes: Chapter 6 – Life Processes
1. Introduction to Life Processes
Life processes are essential functions carried out by living organisms to sustain life, including nutrition, respiration, transportation, and excretion.
2. Nutrition
- Types:
- Autotrophic: Organisms (e.g., plants) prepare their food via photosynthesis.
- Heterotrophic: Organisms depend on others for food (e.g., animals, fungi).
- Photosynthesis Equation:
3. Respiration
- Types:
- Aerobic: Complete breakdown of glucose using oxygen.
- Anaerobic: Partial breakdown of glucose without oxygen.
- Equation (Aerobic):
4. Transportation
- In Plants:
- Xylem: Transports water and minerals.
- Phloem: Transports food (translocation).
- In Animals:
- Blood circulatory system: The heart pumps blood through arteries, veins, and capillaries.
5. Excretion
- In Humans:
- Kidneys remove urea and excess water via urine.
- Nephron: Functional unit of the kidney.
- In Plants:
- Remove waste through stomata, bark shedding, or store it in vacuoles.
Key Diagrams:
- Human digestive system
- Human respiratory system
- Cross-section of a leaf
Most Important Science Class 10 Questions Answers For Board Examination
Top Asked Questions and Answers for CBSE Class 10 Science, Chapter 6: Life Processes
1. Differentiate between autotrophic and heterotrophic nutrition.
| Feature | Autotrophic | Heterotrophic |
|---|---|---|
| Definition | Organisms prepare their food using sunlight. | Depend on other organisms for food. |
| Example | Plants | Animals, fungi |
2. Write the equation for aerobic respiration.
3. What are the raw materials required for photosynthesis?
- Carbon dioxide (CO₂)
- Water (H₂O)
- Sunlight
- Chlorophyll
4. Explain the process of transportation in plants.
- Xylem: Carries water and minerals from roots to leaves.
- Phloem: Transports synthesized food from leaves to different parts (translocation).
5. Describe the human excretory system.
- Kidney: Filters urea and waste.
- Ureter: Transports urine to the bladder.
- Bladder: Stores urine.
- Urethra: Expels urine outside the body.
6. Why do herbivores have a longer small intestine than carnivores?
Herbivores need a longer small intestine to digest cellulose, a complex carbohydrate found in plant material.
Most Important MCQs Science Class 10 For Board Examination
MCQs for Chapter 6: Life Processes
1. Which of the following is a characteristic of autotrophic organisms?
A. Depend on others for food
B. Prepare their own food using sunlight
C. Respire anaerobically
D. Excrete urea
Answer: B
2. What is the role of stomata in plants?
A. Transport food
B. Absorb nutrients
C. Exchange gases and release water vapor
D. Absorb light for photosynthesis
Answer: C
3. Which organ in humans filters blood to form urine?
A. Liver
B. Lungs
C. Kidneys
D. Stomach
Answer: C
4. Which part of the plant transports water and minerals?
A. Phloem
B. Xylem
C. Root hair
D. Chloroplast
Answer: B
5. What is the end product of anaerobic respiration in human muscles?
A. Carbon dioxide
B. Lactic acid
C. Ethanol
D. Glucose
Answer: B
6. The process of digestion in humans begins in the:
A. Stomach
B. Small intestine
C. Mouth
D. Large intestine
Answer: C
7. What is the main excretory product in humans?
A. Ammonia
B. Urea
C. Uric acid
D. Carbon dioxide
Answer: B
8. Which pigment in plants captures sunlight for photosynthesis?
A. Xanthophyll
B. Chlorophyll
C. Carotene
D. Anthocyanin
Answer: B
9. During respiration, energy is stored in the form of:
A. Glucose
B. ATP
C. NADPH
D. Oxygen
Answer: B
10. Transpiration is the process of:
A. Food transport in plants
B. Water loss in the form of vapor
C. Gas exchange through stomata
D. Formation of new leaves
Answer: B
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