Life Processes Class 10 Worksheet with Online Quiz

• Connect every diagram label with a function.
• Trace food through the alimentary canal, keeping accessory glands separate.
• Distinguish breathing, gas exchange and cellular respiration.
• Define arteries and veins by blood-flow direction.
• Practise the two loops of human double circulation.
• Compare xylem transport with phloem translocation.
• Separate filtration from selective reabsorption in a nephron.
• Give evidence and controls when explaining a biological investigation.

• Ask students to explain why a structure suits its function.
• Use the virtual leaf model to change one condition at a time.
• Trace arrows aloud before asking for diagram labels.
• Discuss why an attractive diagram still needs a clear key and accurate direction.
• Use wrong options to uncover misconceptions, then ask students to repair the explanation.

This Life Processes Class 10 worksheet page brings together written practice, an online quiz and interactive biology activities. Revise nutrition, respiration, transportation and excretion in plants and animals. Use the worksheet download already provided on this page for written answers, then test your understanding through the models and explanations above.

Life Processes Class 10 Important Questions

Prepare structure–function questions on villi, alveoli, the heart, stomata and nephrons. Practise explaining double circulation, the role of bile, the breakdown of glucose, transport in plants, and urine formation. These are useful practice themes rather than a prediction of a board paper.

Nutrition in Plants and Photosynthesis Equation

Autotrophic nutrition uses an inorganic carbon source to build organic food. Green plants use light captured by chlorophyll to support photosynthesis. Carbon dioxide enters mainly through stomata, while roots supply water. A commonly used net school equation is shown below; it summarises a complex process.

Photosynthesis Experiment and Starch Test Questions

Destarching reduces previously stored starch so a later iodine result can be connected to the experimental conditions. Compare otherwise similar leaves or plants while changing one factor. Iodine turns blue-black where starch is detected. A partly covered leaf investigates light; a suitable carbon-dioxide comparison investigates CO₂ availability; a variegated leaf can illustrate the role of green tissue. The virtual model assumes enough water, appropriate temperature, a healthy destarched leaf and sufficient time.

Human Digestive System Diagram and Enzyme Table

Bile is produced by the liver and stored in the gall bladder. It is not a digestive enzyme. Food passes through the alimentary canal rather than entering the liver or pancreas. Finger-like villi increase the surface available for absorption.

Aerobic and Anaerobic Respiration Class 10

The first stage of glucose breakdown occurs in the cytoplasm and produces pyruvate. With oxygen, later aerobic stages occur in mitochondria and release substantially more usable energy than fermentation. ATP transfers energy for cellular work. Breathing moves air; gas exchange transfers gases; cellular respiration is a chemical process inside cells.

Do not use the simplified muscle pathway to explain all exercise pain or delayed soreness. Plants also respire during the day and at night; photosynthesis does not replace cellular respiration.

Alveoli Diagram and Mechanism of Breathing

Many alveoli provide a large gas-exchange area. Their thin, moist walls and nearby blood supply help oxygen diffuse from alveolar air into blood and carbon dioxide diffuse in the opposite direction. During normal inhalation, the diaphragm contracts and flattens. Thoracic volume increases, pressure falls relative to the surroundings and air enters.

Human Heart Diagram and Double Circulation

Blood passes through the heart twice in a complete pulmonary and systemic cycle. Separation of the two sides limits mixing of oxygen-rich and oxygen-poor blood. The left ventricle has a thicker muscular wall because it pumps into the systemic circulation at higher pressure. Blue in a diagram is a convention for oxygen-poor blood, not its literal colour.

Difference Between Arteries and Veins

Arteries carry blood away from the heart and veins carry it towards the heart. Oxygen content is not the definition. In normal postnatal circulation, the pulmonary artery carries oxygen-poor blood to the lungs, while pulmonary veins return oxygen-rich blood. Arteries generally have thicker muscular walls; many veins have valves that help limit backflow.

Transportation in Plants Xylem and Phloem

Xylem transports water and minerals, mainly from roots towards aerial parts. Transpiration creates a pull that helps move water through the plant. Phloem translocates sugars from a source to a sink, using energy-dependent loading processes. A sink may be a root, fruit, growing shoot or storage organ. Phloem transport is not always downward; direction depends on the source and sink.

Nephron Diagram and Urine Formation Class 10

Small useful molecules such as glucose can enter the filtrate and are normally reabsorbed in a healthy person. Urine volume depends partly on water balance and the waste load. Not all filtrate becomes urine. Kidneys form urine; the bladder stores it.

Excretion and Egestion Difference

Excretion removes metabolic wastes, such as urea, from the body. Egestion removes undigested and unabsorbed food residues from the digestive tract. Plants can remove or manage wastes through diffusion, storage in tissues, leaf loss, and secretions such as gums and resins.

Life Processes Extra Questions with Answers

1. Why is diffusion alone insufficient in a large multicellular organism? Many cells are far from the outside, and diffusion over long distances is too slow to meet their needs.
2. Why is a herbivore’s small intestine generally longer than a carnivore’s? Plant material can require a longer passage for digestion; diet and digestive adaptations affect the comparison.
3. What happens when stomata close? Water loss can decrease, while carbon-dioxide entry can also become limited.
4. Why are valves useful in the heart? They help maintain one-way blood flow.
5. Why is a filtrate glucose molecule not automatically a urine glucose molecule? It can be reabsorbed from the tubule into blood.

Current Syllabus and Sample Paper Update

The official CBSE Science syllabus for 2026–27 includes the basic concepts of nutrition, respiration, transport and excretion in plants and animals. The official Science sample paper includes bile-related digestion, intestine adaptations, photosynthesis investigation and kidney reabsorption. Use these for reasoning practice. A sample paper is not a record of questions repeated in actual board exams.

Chapter reference NCERT Science Life Processes. Content reviewed on 22 October 2026. The interactive questions on this page are original practice questions, not official CBSE questions.

Nutrition, respiration, transportation and excretion maintain individual organisms. Reproduction is essential for species continuity but is not needed to maintain the life of an individual.

It emulsifies fats into smaller droplets and helps provide suitable conditions for intestinal digestion. The liver produces bile and the gall bladder stores it.

Villi increase absorptive surface area. Their blood supply and lymphatic transport help carry absorbed nutrients away.

A common net school equation is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, in the presence of light and chlorophyll. The released oxygen originates from water.

Destarching reduces previously stored starch so a later iodine test can be interpreted in relation to the experimental conditions.

Breathing moves air into and out of respiratory organs. Cellular respiration releases usable energy through chemical reactions inside cells.

The first stage occurs in the cytoplasm and produces pyruvate. Later aerobic stages take place in mitochondria.

A complete cycle includes pulmonary and systemic loops, so blood passes through the heart twice.

No. Arteries carry blood away from the heart. The pulmonary artery carries oxygen-poor blood to the lungs in normal postnatal circulation.

Xylem transports water and minerals, mainly from roots towards shoots. Phloem carries sugars from a source to a sink; direction depends on their locations.

Glomerular filtration and selective tubular reabsorption are central Class 10 concepts. The filtrate is further processed before urine passes into the urinary drainage system.

Practise labelled diagrams, structure and function, digestion, photosynthesis investigations, respiration pathways, double circulation, plant transport and nephron reasoning. Use official papers to identify genuine previous-year questions.