Back to Science on Exam Trends
Life Processes
High trendapprox. 8 marksSections C/D — labelled diagrams (heart, nephron, alveoli) and process descriptions.
CBSE 2027 — dates, rules and official papers →Ask the tutor1Use direction arrows on every biology diagram — unmarked arrows lose the diagram mark.
Notesformulae · proofs · mind-map — one view
Learn the 7 conceptsteach yourself first, then practise each
Nutrition in humans (digestion + enzymes)2–3 marks Visual
Track which enzyme acts where (mouth → stomach → small intestine).
Respiration (aerobic vs anaerobic + alveoli exchange)2–3 marks
Compare end-products and write the gas-exchange equation.
Transportation (heart chambers + double circulation)3–5 marks Visual
Label the four chambers and trace blood flow with arrows.
Excretion (nephron + filtration → reabsorption → urine)3–5 marks
Describe each step and name the structure responsible.
Transport in plants (xylem vs phloem)1–2 marks
State what each transports and the driving force.
Photosynthesis — autotrophic nutrition in plants2–3 marks
Write CO₂ + H₂O → glucose + O₂ (sunlight, chlorophyll) and explain the role of stomata and guard cells.
Excretion in plants1–2 marks
List how plants shed waste: O₂ from photosynthesis, excess water by transpiration, wastes stored in leaves that fall or as resins and gums, or released into the soil.
When you’re ready — practise or test the whole topic