A great majority of insects are quite small. Minutenss is advantage on account of the following aspects
Protection against predators
Small size of insects helps to hide in cracks and crevices and thus escape. They even are overlooked due to their small siz
FOOD SUPPLY :insect required very little quantity of food and thus can pass difficult time easily to continue its race. It can feed in cracks and inside plant tissue
Insect can move easily as they are not to carry heavy skeleton
Insect if fly easily to escape from their enemies
Small size facility better food and oxygen supply removal of waste product
Structures of the body
Structure of the body of the insect, which help them for their success on the earth are described as under:
1-chitin
2-muscles
3-segmentation
4-wings
5-legs
Circulation
Blood in insect is without red blood corpucles. It is yellowish green fluid called haemolymph. The major function oh haemolymph is to supply nutrients to tissues and remove waste products
Respiration
In insect air is taken directly by all parts of the body. Trachaeal system in insect is considered as the most efficient system. Trachea are abundant particularly in muscle of flight
Separate period of growth
In most insects there is a distant pupal stage. The growth take place in the larval stage and their in pupal stage where their is development of organ of reproduction
Rapidity of growth
Insect grow very fast speed due to short life cycle. In fact is the plant eating insect multiple in accordance with their natural power
Power of reproduction of ficundity
Insect passes enormous power of reproduction. This is mainly result of large number og eggs land per female
Care of young one
Insect exhibit most advance instinct for the care of young one