CBSE Class XII Biology HOTs Questions Database for chapter Biodiversity. Based on CBSE and CCE guidelines. The students should practice these HOTs Questions to gain perfection which will help him to get more marks in CBSE examination. Based on CBSE and CCE guidelines. Based on the same pattern as released by CBSE every year. CBSE releases HOTs Questions every year. These papers are released prior to the CBSE board examinations so that students can do practice. databse of 1 marks, 2 marks, 3 marks and 5 marks questions.
Ans.1) a) Genetic diversity
b) Species diversity
Ans.1) a) Angiosperms
Ans.2) Latitudinal gradients in biodiversity. Biodiversity decreases as latitude increases .
Biodiversity decreases as one move from tropics to equator.]
Q.3) Would the extinction of one insect pollinator affect the ecosystem? Explain 2
It may lead to co-extinction of species
In the case of a co-evolved plant-Pollinator Mutualism where extinction of one invariably Leads to the extinction of the other
Ans.7) National parks- in situ- It is the practice of protecting the endangered species in their natural habitats either by protecting or by defending the species from predators.
Zoological parks- ex situ- the threatened species are taken out from their natural habitat and placed in special setting and given protection and special care.
Ans .8) i) High level of species richness
ii) High degree of endemism
Ans.9.These are examples of Alien species invasions. They threaten the indigenous species & lead to their extinction.
Ans.2) 0.2 is obtained in studies regardless of the taxonomic group or the region 1.2 is obtained if species area relationship is analysed among very large areas like the entire continents.
Ans.3) According to the hypothesis proposed by Paul Ehrlich the "vivet popper hypothesis" each species is essential in the balance of nature. If one is lost that much imbalance is caused in the ecosystem.
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