For class 5 f. Why are green plants called producers?

Green plants are called producers because they manufacture their own food with the aid of photosynthesis.

Chlorophyll allows the plants to trap solar energy and convert it into chemical energy. In the whole ecosystem only green plants can do that. Food produced by plants are taken up by primary consumers. Secondary consumers derive nutrition from primary consumers, and so on.

Thus all the consumer organisms in an ecosystem get energy directly/indirectly from the trapped solar energy stored in plants. This is why plants are called the producers.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.