Science (English Medium) Class 12 - CBSE Important Questions for Biology

Use the information provided in the table given below to answer the following questions:

1. Calculate the gross primary productivity.
2. Analyze the trend in the Net Production from Producers to Top Carnivore. Give a reason for your observation.

Why are scared groves highly protected?

Name the type of biodiversity represented by the following:

50,000 different strains of rice in India.

Mention the kind of biodiversity of more than a thousand varieties of mangoes in India represent. How is it possible?

There are many animals that have become extinct in the wild but continue to be maintained in Zoological parks.
(i) What type of biodiversity conservation is observed in this case?
(ii) Explain any other two ways which help in this type of conservation.

List six advantages of the "ex-situ' approach to conservation of biodiversity.

Suggest two practices giving one example of each, that help protect rare or threatened species.

Which of the following is an example of ex-situ conservation?

There was a loss of biodiversity in the ecosystem due to a new construction project in that area. What would be its impact on the ecosystem? State any three.

Which one of the following groups faces maximum threat of extinction? 

The sixth extinction in progress currently is different from all previous extinctions on earth as it is ______.

Give three reasons as to why the prokaryotes are not given any figures for their diversity by ecologists.