HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

Lichens taking roots on bare rocks are an example of ______.

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

All types of ecological succession whether on land or in water always reaches ______.

What is ‘Sere’?

Define ‘Ecological succession’.

What is ‘Climax community’?

Name the types of succession of plants based on the nature of habitat.

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

What are ‘pioneer species’? Give two examples of them.

Explain the following sequence of succession after a forest fire.

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

A farmer is fed up of weeds in his Wheat farm. Which of the following chemicals he can use to overcome the problem?

Gibberellins are synthesised from ______.

First natural cytokinin was obtained from ______.

Buyers often complain that a particular fruit merchant uses some chemical to ripen fruits in his shop.

Name the chemical he must be using to do so.

Why is ABA known as antitranspirant?

Name the tissue that transports hormones within the plant body?

Match the column A with B

A gardener wants to give bushy appearance to plants in our college campus.

1. What should he do to achieve the same? 
2. Which property of phytohormones he must be aware of?

Write the name of______

1. First hormone discovered in plants.
2. Biological name of fungus from which Gibberellins were first isolated. 
3. The name given to the first cytokinin by Skoog and Miller.