Pesticides added to a field are seen in increased amount in the crop and in the birds that feed on them. What is this phenomenon called?

Name the seven colours of light. What is this phenomenon called?

Snakes ad lizards shed off their scales often. This phenomenon is called as:

If a superior competitor is removed from the area, there is always an increased population of the otherwise exploited species. This phenomenon is called

Presistent pesticides such as DDT pass into food chain and increase in amount per unit weight of organism due to their accumulation in fat. This phenomenon is called

What are the organisms that feed on plant sap and other plant parts called?

Excessive and continous use of pesticides has resulted in evolution of some new species of pests. Explain what must have led to this. What is this type of evolution called ?

Suppose a child learns the name of a bird as parrot he /she starts referring to all the birds as parrots. What is this called?

Create an aquatic food chain in a water body into which effluents flow from a pesticide factory. Diagrammatically represent and answer the following questions : (i) What is the phenomenon called? (ii) Explain biomagnification of pesticide.

What type of insect pests are found in our crop fields ? Name any three of them.