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Class: Class 7 Subject: Science Topic: Basic concepts of Science

Respiration is the process of breaking down food to release energy.

 Aerobic Respiration:

· Requires oxygen.

· Produces a large amount of energy.

· Example: Humans, animals, plants.

 Anaerobic Respiration:

· Occurs without oxygen.

· Produces less energy and by-products like alcohol or lactic acid.

· Example: Yeast (produces alcohol), muscle cells during heavy exercise (produce lactic acid).