Answer:
Option A
Explanation:
Most of the human economic systems if not all operate with the human natural systems. Human economic system and natural systems almost dependent on one another in that they are linked by a network of interconnected processes; for example, human economic activity depend on natural, including a maintained system of primary productivity such as forests and agriculture etc.
Answer:
Kidneys, ureters and bladder
Answer:
The basic unit of life is a cell
There are five classes of food, out of this five only two provides energy; these are carbohydrate and fat and oil. Out of these two, carbohydrate provides the most energy for the body in the shortest time. This is the reason why glucose, which is the end product of carbohydrate is normally given to sport men during games.
