HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Who introduced the term biodiversity?

What are the three levels of biodiversity?

Compare and Contrast the insitu and exsitu conservation.

Why do we find a decrease in biodiversity distribution, if we move from the tropics towards the poles?

Right to Clean Water is a fundamental right, under the Indian Constitution.

With which of the following, the Agenda 21’ of Rio Summit, 1992 is related to?

What are the strategies to be implemented in India to attain total reproductive health?

The following is the illustration of the sequence of ovarian events (a-i) in a human female.

Write the difference between C and H.

What effect can fertilizer runoff have on an aquatic ecosystem?

What is amniocentesis? Why a statutory ban is imposed on this technique?

Amniocentesis, the foetal sex determination test, is banned in our country, Is it necessary? Comment.

The golden age of reptiles was ____________.

Which period was called “Age of fishes”?

Modern man belongs to which period?

The most common substrate used in distilleries for the production of ethanol is _______.

Cyclosporin - A is an immunosuppressive drug produced from ____________.

CO₂ is not released during ________.

The gases produced in anaerobic sludge digesters are _______.

Give any two bioactive molecules produced by microbes and state their uses.

Define the following term

Antibiotics