How are diseases categorized?

How are enzymes categorized?

Observe the given graph , representing distribution of major biomes and answer the following questions : . (i) On what basis the major biomes are categorized ?

Fill in the blanks with suitable word: Animals have been categorized as ______and______.

Right or wrong . If wrong , write the correct sentence : Fire caused due to household gas is categorized as class D fire .

On mixing aqueous solutions of silver nitrate and sodium chloride, a white precipitate is obtained. This reaction can be categorized as _____ reaction.

Name the diseases caused by viroids?

Why are thalassemia and heamophilia categorized as Mendelian disorders?

Enlist the various disorders and diseases related to the excretory system.

Name one disease caused by smoking?

What criteria should one use in categorizing a species as threatened?