2.24a

Carbohydrate

1. When grass is flowered they produce seeds which provide rice and wheat, containing the source of carbohydrate.
2. Rice and wheat are forms of starch and starch is also a form of carbohydrate.
3. The root tuber of the potato is also a form of carbohydrate as they have starch stored in their tubers.
4. Carbohydrate provide us with energy through the process of respiration.

Protein

1. animal protein and fish are a well known source of protein. plants can also provide us with proteins through their beans.
2. Proteins are associated with growth, particularly the growth of muscles.

Lipids

1. Lipids comes from animals like cows and fish (oils) and plants (palm oil, sunflower oil). Oil is a form of lipid as it provides us with fat.
2. Lipids are associated with stored energy and insulation.