Biodiversity and Conservation · Biology · NEET

Arrange the following in descending order of number of species in the Amazonian rain forest.

(a) Plants

(b) Birds

(c) Fishes

(d) Invertebrates

(e) Mammals

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Exploring molecular, genetic and species-level diversity for products of economic importance is called

Since the origin and diversification of life on Earth, there have been five episodes of mass extinction of species. How is the sixth extinction, which is in progress, different from the previous episodes?

Which of the following statements are correct?

A. The Amazon rainforest being cut and cleared for cultivation of soyabeans is an example of habitat loss.

B. Steller's sea cow and passenger pigeon became extinct due to over-exploitation by humans.

C. The Nile perch introduced into Lake Victoria in East Africa helped in population growth of cichlid fish in the lake.

D. Water hyacinth is an invasive species.

E. When a species becomes extinct, the plant and animal species associated with it are not affected.

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Which of the following is an in situ conservation method?

"The Evil Quartet" of biodiversity loss includes which of the following?

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

Match List-I with List-II

Choose the option with all correct matches.

The regions with high level of species richness, high degree of endemism and a loss of $$70 \%$$ of the species and habitat are identified as:

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

Cryopreservation technique is used for :

Match List-I with List-II:

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The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called

These are regarded as major causes of biodiversity loss:

A. Over exploitation

B. Co-extinction

C. Mutation

D. Habitat loss and fragmentation

E. Migration

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List of endangered species was released by

Tropical regions show greatest level of species richness because

A. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification.

B. Tropical environments are more seasonal.

C. More solar energy is available in tropics.

D. Constant environments promote niche specialization.

E. Tropical environments are constant and predictable.

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Match List I with List II

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In 'rivet popper hypothesis', Paul Ehrlich compared the rivets in an airplane to :

For chemical defence against herbivores, Calotropis has :

Which of the following is/are cause(s) of biodiversity losses ?

Among ‘The Evil Quartet’, which one is considered the most important cause driving extinction of species?

The historic Convention on Biological Diversity, ‘The Earth Summit’ was held in Rio de Janeiro in the year

Give the correct descending order of organisms with reference to their estimated number found in Amazon forest.

(a) Plants (b) Invertebrates (c) Fishes (d) Mammals (e) Birds

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The World Summit on sustainable development held in 2002 in Johannesburg, South Africa pledged for

Match List - I with List - II :

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Match the List-I with List-II :

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Frugivorous birds are found in large numbers in tropical forests mainly because of :

Western Ghats have a large number of plants and animal species that are not found anywhere else. Which of the following term is used to notify such species?

Which of the following are true about the taxonomical aid 'key'?

(a) Keys are based on the similarities and dissimilarities.

(b) Key is analytical in nature.

(c) Keys are based on the contrasting characters in pair called couplet.

(d) Same key can be used for all taxonomic categories.

(e) Each statement in the key is called Lead.

Choose the most appropriate answer from the options given below:

Which of the following is not a method of ex situ conservation?

Habitat loss and fragmentation, over exploitation, alien species invasion and co-extinction are causes for :

In-situ conservation refers to :