Photosynthesis

Do you know how plants make their food? Not just plants but algae and certain bacteria can also make their food from sunlight. These are called autotrophs, meaning they can produce their own food through a process called photosynthesis.

Generally, it occurs in specialized structures called chloroplasts, where the chlorophyll pigment is present.

This pigment uses water, sunlight, and carbon dioxide to produce an organic compound called glucose, a carbohydrate that serves as food. This process also releases oxygen.

Glucose is the main energy source for plants to grow and form flowers.

At the same time, the oxygen released as a byproduct during photosynthesis is used by animals, including humans, to breathe and survive.

Unlike autotrophs, heterotrophs, such as animals and fungi, lack the specialized structures and pigments to perform photosynthesis. But, they obtain their energy by consuming other organisms.

When a bird eats a caterpillar, it obtains energy derived from the plants that the caterpillar consumed. This chain of energy shows how photosynthesis connects all life and powers entire ecosystems.