Explain with appropriate example what marks emerge in case of biodiversity if degradation of ecosystem occurs.

Give one example of exotic species causing damage of local biodiversities in aquatic ecosystem.

(a) What is adaptive radiation. (b) Explain with the help of suitable example where adaptive radiation has occurred to represent convergent evolution.

Explain the process of Natural selection as proposed by Darwin with the the help of a suitable example . What are the roles of swim bladder in the aquatic of Rohu fish ?

Explain the pond ecosystem as a classical example of ecosystem.

(a) With the help of well-labelled diagrams, describe the process of plasmolysis in plants, giving appropriate examples. (b) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.

What is meant by pseudo unimolecular reaction. Explain with an example. 0.0625g remains from 1g of a radioactive element after 20 years of radioactive decay. Determine the rate constant and half-line (t1/2) of the reaction. How much of the element did remain after 10 years from the start.

What is meant by pseudo unimolecular reaction? Explain with an example. 0.0625 g remains from 1 g of a radioactive element after 20 years of radioctive decay. Determine the rate constant and half-life (t_(1//2) of the reaction. How much of the element did remain after 10 years from the start?

Define Eltonian Pyramid. Explain number energy and biomass of pyramid of an ecosystem with example.

What is leaching? Explain with an example.

What is octet rule? Explain with an example.