Question

How do living organisms derive their energy? What strategies have they evolved? How do they store this energy and in what form? How do they convert this energy into work?

Answer 1

Part 1: Source of energy
The sun is the ultimate source of energy for all living organisms in an ecosystem.
Producers (such as plants) being autotrophs. use energy from sunlight to make organic matter from carbon dioxide and water in the process of photosynthesis.
Consumers being heterotrophs feed on these producers and obtain energy


Part 2: Strategies evolved to derive energy
Respiration is a catabolic process by which food is broken down to release energy in the form of heat.

Part 3: Stored form of energy
In living systems, the energy is stored in the terminal phosphate bond of adenosine triphosphate (ATP).

Part 4:Releasing of energy from ATP
The terminal bond of ATP is broken to release the energy during various metabolic activities in the living system. This is how the stored energy is converted to work.