Observe the following table showing different activities in the lake and thier influence.
People living in catchment area of Kolleru faced so many probles. Why?

Observe the following table showing different activities in the lake and thier influence. What are the reasons for chemical problems ?

Read the table and answer the following questions. People living in catchment area of Kolleru face many problems. Why ?

Observe the following table showing different activities in the lake and thier influence. What happens if he dissolved oxygen reduced in lake water?

Observe the following table showing different activities in the lake and thier influence. Do you find any relationship between bio-logical and physical problems ?

Observe the following table showing different activities in the lake and thier influence. What are the factors that affected the number of migratory birds to decrease ?

Observe the following table showing different activities in the lake and thier influence. Is BOD of turbid andnutrient rich water high or low ? what are it's consequences ?

Draw a lake showing different zones. Why are they called so?

Observe the following table. If the acqueous solutions of A and B are mixed, what will be that colour of the solution so formed in the presence of methyl orange indicator ? Why ?

In the pond , we find that different organisms live in different regions. This is due to some conditions like availability of different amount of food, air, light etc. Now let us study the table 4 , showing organisms living in different regions of a pond and answer the question. Can different places in the pond also be called habitat? Why? Or why not?

Observe the table.Answer the follwoing questions basing on the information. Why the Kolleru Lake filled up with weeds ?