PLS FOUNDATION
Connect cells, plants and the systems that sustain life.
4 GUIDES · ENGLISH & HINDI
Start with a level that fits what you already know. Each guide includes explanations, practice and answers. About learning levels →
Biology
BeginnerA living cell is a working system, not just a labelled circle.
Learning outcome: Link organelles with functions, distinguish diffusion from osmosis, and reason about cell size, specialisation and evidence from microscope drawings.
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BeginnerA tree gains material, captures energy and moves water without a heart.
Learning outcome: Distinguish matter inputs from energy input, explain stomatal trade-offs, and reason about water transport and net gas-exchange measurements.
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BeginnerFood does not travel directly from the plate into a muscle.
Learning outcome: Explain the work of the main digestive organs, connect enzyme action with surface area, and interpret simple composition data without turning it into a personal diet prescription.
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IntermediateBreathing moves air, blood moves materials, and cells transform chemical energy.
Learning outcome: Explain ventilation, diffusion and double circulation, then distinguish the rate of moving air or blood from the rate at which tissues actually receive oxygen.
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