Get complete, step-by-step SEBA Class 10 Science Chapter 6 inside book (in-text) question answers aligned with the new 2026–27 syllabus. Access all page-wise questions, internal short notes, and key concept explanations to boost your HSLC board exam preparation.
EXTRA QUESTION AND ANSWER
Q1. What are life processes? Name any four essential life processes.
Answer: The basic functions performed by living organisms to maintain their life on Earth are called life processes. Four essential life processes are nutrition, respiration, transportation, and excretion.
Q2. Why is molecular movement essential for life?
Answer: Molecular movement is essential for life because it allows the exchange of materials and energy within cells. It helps in repairing damaged tissues and maintaining cellular structures, preventing the breakdown of life.
Q3. What is nutrition and why is it important for living organisms?
Answer: Nutrition is the process by which living organisms take in food and utilize it for body functions. It is important because it provides energy for daily activities and supplies raw materials needed for growth and tissue repair.
Q4. What are the main differences between autotrophic nutrition and heterotrophic nutrition?
Answer: The main differences between autotrophic nutrition and heterotrophic nutrition are: In autotrophic nutrition, organisms prepare their own food from simple inorganic substances like carbon dioxide and water using sunlight (for example, green plants). In heterotrophic nutrition, organisms cannot prepare their own food and depend on other organisms for nutrition (for example, animals and fungi).
Q5. Write the chemical equation for photosynthesis.
Answer: 6CO2 + 6H2O –(Sunlight / Chlorophyll)–> C6H12O6 + 6O2
(Carbon dioxide + Water gives Glucose + Oxygen)
SEBA Class 10 Science Chapter 6 Inside Questions
Q6. State the three main events that occur during photosynthesis.
Answer: The three main events during photosynthesis are:
- Absorption of light energy by chlorophyll.
- Conversion of light energy into chemical energy and splitting of water molecules into hydrogen and oxygen.
- Reduction of carbon dioxide into carbohydrates (glucose).
Q7. What is the role of stomata in photosynthesis?
Answer: Stomata allow the exchange of gases by taking in carbon dioxide and releasing oxygen during photosynthesis. They also help in transpiration and regulate water loss through the action of guard cells.
Q8. Why are nitrogen and magnesium important for plants?
Answer: Nitrogen is essential for the synthesis of proteins and nucleic acids required for plant growth. Magnesium is a vital constituent needed for the formation of chlorophyll in plant leaves.
Q9. What is heterotrophic nutrition and what are its main types?
Answer: Heterotrophic nutrition is the mode of nutrition in which organisms cannot synthesize their own food and depend on autotrophs or other organisms. Its three main types are saprophytic nutrition, parasitic nutrition, and holozoic nutrition.
Q10. How does an Amoeba obtain its food?
Answer: Amoeba extends finger-like temporary projections called pseudopodia to engulf food particles, enclosing them in a food vacuole. Digestive enzymes break down the food inside the vacuole, nutrients are absorbed, and the remaining undigested waste is thrown out through the cell surface.
Class 10 Science Chapter 6 In Text Question Answer SEBA 2026-27
Q11. What is peristalsis?
Answer: Peristalsis is the rhythmic contraction and relaxation of muscles in the walls of the food pipe (oesophagus) that pushes food downward into the stomach.
Q12. What is the role of hydrochloric acid in the stomach?
Answer: Hydrochloric acid kills harmful bacteria that enter with food and provides an acidic medium required for the digestive enzyme pepsin to function.
Q13. Write two important functions of bile juice.
Answer: Bile juice makes the acidic food coming from the stomach alkaline for pancreatic enzymes to act, and it breaks down large fat globules into smaller droplets through emulsification.
Q14. What are villi and what is their function?
Answer: Villi are tiny finger-like projections present on the inner lining of the small intestine. They increase the surface area for the efficient absorption of digested food into the blood.
Q15. What are the main differences between aerobic and anaerobic respiration?
Answer: The main differences between aerobic and anaerobic respiration are:
- Aerobic respiration takes place in the presence of oxygen, whereas anaerobic respiration takes place in the absence of oxygen.
- The end products of aerobic respiration are carbon dioxide and water, whereas the end products of anaerobic respiration are ethanol/lactic acid and carbon dioxide.
- Aerobic respiration releases a large amount of energy, whereas anaerobic respiration releases a very small amount of energy.
SEBA Class 10 Science Chapter 6 Page Wise Solutions
Q16. What are the end products of respiration in yeast and in human muscle cells?
Answer: In yeast, anaerobic respiration produces ethanol, carbon dioxide, and energy. In human muscle cells during heavy exercise, anaerobic respiration produces lactic acid and energy.
Q17. What is ATP and why is it called the energy currency of the cell?
Answer: ATP (Adenosine Triphosphate) is a molecule that stores energy released during cellular respiration. It is called the energy currency of the cell because it provides immediate energy required to drive various cellular processes and metabolic activities.
Q18. Explain the role of alveoli in the human lungs.
Answer: Alveoli provide a very large surface area for the exchange of gases in the lungs. Their thin, capillary-rich walls allow oxygen to diffuse into the blood and carbon dioxide to diffuse out of the blood.
Q19. What is double circulation and why is it important in human beings?
Answer: Double circulation is a system where blood passes through the heart twice during one complete cycle through the body. It is important because it completely separates oxygenated and deoxygenated blood, ensuring an efficient supply of oxygen to maintain body temperature.
Q20. What are the main differences between arteries and veins?
Answer: The main differences between arteries and veins are:
- Arteries carry oxygenated blood away from the heart to various body parts, whereas veins carry deoxygenated blood from body parts back to the heart.
- Arteries have thick, elastic walls to withstand high blood pressure, whereas veins have thinner walls with valves to prevent the backflow of blood.
HSLC Class 10 Science Chapter 6 Internal Question Answer
Q21. What are the main components of human blood and their functions?
Answer: Human blood consists of four main components:
- Plasma: A fluid that transports nutrients, hormones, carbon dioxide, and nitrogenous wastes.
- Red Blood Cells (RBCs): Contain hemoglobin to carry oxygen from the lungs to all body cells.
- White Blood Cells (WBCs): Fight against infections and protect the body against diseases.
- Platelets: Help in blood clotting to prevent excessive bleeding at the site of an injury.
Q22. What is lymph and what are its main functions?
Answer: Lymph is a colorless tissue fluid formed when plasma, proteins, and blood cells escape through the pores of capillaries into intercellular spaces. Its main functions are carrying digested and absorbed fats from the intestine and draining excess fluid from extracellular spaces back into the blood.
Q23. What are xylem and phloem in plants?
Answer: Xylem is a vascular tissue that transports water and dissolved minerals upwards from the roots to the leaves in a single direction. Phloem is a vascular tissue that transports food synthesized in the leaves to other parts of the plant in both upward and downward directions.
Q24. What is transpiration and why is it important for plants?
Answer: Transpiration is the process of loss of water in the form of water vapor from the aerial parts of a plant through stomata. It is important because it creates a suction pull that drives the upward movement of water and minerals, and it helps in regulating the temperature of the plant.
Q25. What is translocation in plants?
Answer: Translocation is the transport of soluble products of photosynthesis, such as sucrose, from the leaves through the phloem tissue to various growing and storage organs of the plant.
Class 10 Science Chapter 6 Extra Inside Questions SEBA
Q26. How does transpiration help in the upward movement of water in plants?
Answer: Evaporation of water molecules from the stomata of leaves creates a suction pressure known as transpiration pull. This pull continuously draws water upwards through the xylem vessels from the roots to the highest parts of the plant.
Q27. What is excretion and why is it necessary for living organisms?
Answer: Excretion is the biological process of removing harmful metabolic waste products from the body of an organism. It is necessary because the accumulation of toxic wastes like urea and uric acid can damage cells and lead to death.
Q28. What are the main parts of the human excretory system?
Answer: The human excretory system consists of four main parts: a pair of kidneys, a pair of ureters, a urinary bladder, and a urethra.
Q29. What are nephrons and what are their main functions?
Answer: Nephrons are the basic structural and functional filtration units of the kidney. Their main functions are filtering nitrogenous wastes from the blood, reabsorbing useful substances like glucose, amino acids, and water, and forming urine.
Q30. What is dialysis and when is it required?
Answer: Dialysis is an artificial procedure used to filter metabolic waste products and excess fluid from the blood using a dialyzing machine. It is required when an individual’s kidneys fail to perform their normal filtration function due to infection, injury, or disease.
📌 In-Text Solutions Notice: This post features all page-wise inside book (in-text) questions and answers for SEBA Class 10 Science Chapter 6, fully updated for the 2026–27 academic year. Use these internal solutions alongside exercise questions for thorough HSLC exam preparation.
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