List Any Four Techniques Where the Principle of ex-situ Conservation of Biodiversity Has Been Employed. - Biology


List any four techniques where the principle of ex-situ conservation of biodiversity has been employed.



Ex situ conservation is the conservation of selected rare plants or animals in places outside their natural homes. Ex situ conservation of biodiversity has been employed in

(i) Gene banks: These are the institutes which maintain stocks of viable seeds, live growing plants, tissue culture and frozen germplasm with the whole range of genetic variability.

(ii) Cryopreservation: Cryopreservation can maintain tissue culture, embryos, gametes, animal cells or tissues. Endangered organisms are being cryopreserved so that they can be revived to help in conservation.

(iii) Orchards: Plants with recalcitrant seeds are grown in orchards where all possible strains and varieties are maintained.

(iv) Tissue culture: It is carried out through callus formation, embryoids, pollen grain culture and shoot tip culture in plants which are either seedless, have recalcitrant seeds, variable seed progeny or where clones are to be maintained.

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2014-2015 (March) All India Set 1

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Why are scared groves highly protected?

Why should we conserve biodiversity ? How can we do it?

What are sacred groves? What is their role in conservation?

Among the ecosystem services are control of floods and soil erosion. How is this achieved by the biotic components of the ecosystem?

'in-situ' Conservation can help endangered/threatened species. Justify the statement.

Name and describe any three causes of bio-diversity losses.

Define PAR(photosynthetically active radiation)

Write a short note on Chipko Movement.

Write a short note on Joint forest management.

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.

Define cryopreservation.

Conservation of biodiversity is important for ______.

National parks and sanctuaries are established for the purpose of ______.

In which one of the following countries, the ‘Earth Summit’ was held?

What do you understand by ‘hotspots’?

Most abundantly distributed organic substance of the biosphere is ______.

The vascular bundles, which are usually surrounded by a well-developed sclerenchymatous sheath present in:

Which one of the following is not included under in-situ conservation?

Which of the following is the contractile protein of a muscle?

Which one of the following is not a feature of biodiversity hotspots?

The Historic convention on Biological Diversity held in Rio de Janeiro in 1992 is known as ______.

What is common to the techniques;-

  1. In vitro fertilisation
  2. Cryopreservation
  3. Tissue
  4. Culture

What are sacred groves?

How many hotspots were initially identified in the world?

Amazon rain forests are considered as 'Lungs of the planet' as they contribute ______ of the total oxygen in the earth's atmosphere.

Define the terms endemism

How is the presently occurring species extinction different from the earlier mass extinctions?

What is an endangered species? Give an example of an endangered plant and animal species each?

Which one of the following areas in India, is a hotspot of biodiversity?

The region of biosphere reserve, which is legally protected and where no human activity is allowed is known as ______ .

Which one of the following is not a method of in situ conservation of biodiversity?

Exploration of molecular, genetic and species-level diversity for novel products of economic importance is known as ______.

"Biodiversity plays a major role in many ecosystem services that nature provides."

State one ethical reason for conserving biodiversity.


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