HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

Identify the appropriate term for the number of births under ideal conditions:

Explain the term Emigration.

Explain ‘Carbon cycle’.

Mention any 'two' ecological services forthe benefit of mankind

Give diagrammatic representation of pyramid of numbers.

What is the role of decomposers in an ecosystem?

Guano deposits are rich in ______.

In a food chain, the herbivores are represented by

(A) producers

(B) primary consumers

(C) secondary consumers

(D) decomposers

Explain energy pyramid

The abundance of phosphate, causing algal overgrowth resulting in depletion of oxygen and killing other aquatic life is known as --------------------------. 

Name any ‘two’ edible varieties of mushrooms. Give nutritional values of these. 

Secondary consumers are __________.

Growth of new grasses and shrubs on a patch of forest burnt down by forest fire, is a an example of ______.

What is ‘Sere’?

What is ‘Climax community’?

Give reasons – ‘Primary succession is always slower than secondary succession’

Explain the progress of ecological succession in newly formed volcanic island.

Name various seral stages from pioneer species to climax community with suitable examples in hydrarch succession.

Describe the different communities involved in the process of succession.

Draw a diagram of pyramid of energy.