Describe the different ways by which the housefly contaminates our food.

What are the four major aspects of personal hygiene?

The figure given below represents an organism. Study the same and answer the following question:

(a) Identify the organism and write its scientific name.

(b) Is it a causative agent of any disease? If yes, name the disease.

(c) Label the guidelines 1, 2 and 3.

(d) Is it a unicellular or a multicellular organism ? Mention the specific category of organisms to which it belongs.

(e) Write one important function of the part numbered 1.

Mosquitoes have become a nuisance in the lives of people. Several steps are recommended to destroy mosquitoes in different stages. One of the step is 'Biological control' in which a kind of fish is introduced in the ponds, as shown below in the figure.

(a) What are the four stages in the life cycle of a mosquito ?

(b) Name the fish which selectively devours mosquito larvae.

(c) Give an example of insecticide (full form) which can be sprayed in ponds and marshy places to kill the larval stages of mosquitoes.