Question:

Cryopreservation of gametes of threatened species in viable and fertile condition can be referred to as

Updated On: Jul 25, 2024
  • in situ conservation by sacred groves
  • in situ cryo-conservation of biodiversity
  • in situ conservation of biodiversity
  • advanced ex situ conservation of biodiversity.
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The Correct Option is D

Solution and Explanation

Cryopreservation is an advanced method of ex situ conservation. It involves preservation at -196 o C in liquid nitrogen. It can maintain tissue culture, embryos, animal cells/tissues, spermatozoa indefinitely. The cryopreserved material is revived through special technique, when required. dry weight of tobacco, with biosynthesis taking place in the roots and accumulation occurring in the leaves. Strychnine is an alkaloid plant toxin extracted chiefly from Nux vomica', formerly used as a stimulant. These are not metabolic disorder products but are metabolic wastes.
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Biodiversity and Conservation

The term ‘biodiversity’ is derived from the two words- ‘bios' which means life and ‘diversity’ i.e, differentiation or variation. Edward Wilson, the sociobiologist was the first to popularise the term ‘biodiversity’ in the year 1992. The term implies the occurrence of various plants and animals along with their variants such as biotypes, ecotypes and genes on earth. In our biosphere, the immense diversity or heterogeneity remains not only at the species level but also, at every level of biological organization that ranges from macromolecules in the cells to biomes.

Biodiversity and Conservation is a topic covered under the fifteenth chapter and Unit 5 of NCERT class 12 biology.