Biodiversity and Conservation

Assertion : Tropical regions have got a long evolutionary time for species diversification as compared to temperate regions.

Reason : Temperate regions have undergone frequent glaciations in the past whereas tropical regions have remained relatively undisturbed for millions of years.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.

Assertion : If the species-area relationships are analyzed among very large areas like the entire continents, the value of Z, i.e., slope of line lies in the range of 0.1 to 0.2.

Reason : The value of Z i.e., slope of line of species area relationships lies in the range of 0.6 to 1.2 when analysis is done among small areas.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.

Assertion : Species with low genetic variability are generally at greater risk of extinction than the species with more genetic variability.

Reason : Species with low genetic variability are more vulnerable to diseases, predators or other environmental challenges.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.

Assertion : Over-exploitation of a species reduces the size of its population eventually leading to its extinction.

Reason : Steller's sea cow is a large, herbivorous, terrestrial mammal which is on the verge of extinction due to over exploitation.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.

Assertion : The Nile perch introduced into lake Victoria in East Africa led to the extinction of an ecologically unique assemblage of more than 200 species of cichlid fish in the lake.

Reason : When alien species are introduced deliberately for economic or other uses, they often become invasive and cause extinction of indigenous species as their natural predator is not present.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.

Assertion : Broadly utilitarian arguments say that we should conserve biodiversity because biodiversity plays a major role in many ecosystem services that nature provides.

Reason: Exploration of molecular, genetic and species level diversity to obtain the products of economic importance is included under broadly utilitarian category.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.

Assertion : Biodiversity hotspots are the regions which possess high levels of species richness, high degree of endemism and no loss to habitats.

Reason : Total number of biodiversity hotspots in the world is 32 with two of these hotspots found in India.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.

Assertion : One of the most important traditional uses of sacred groves was that they acted as a repository for various ayurvedic medicines.

Reason : In modern times, sacred groves have become biodiversity rich areas, as they provide refuge to various plant and animal species of conservation significance.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.

Assertion: All resources are not exhaustible

Reason: Renewable resources can become non-renewable.

• Both Assertion and Reason are true and Reason is correct the explanation of Assertion

• Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

• Assertion is true, but Reason is false

• Assertion is false, but Reason is true

Assertion: Genetic variation shown by the plant Rauwolfia vomitoria growing in different Himalayan ranges is very important economically.

Reason : The amount and variety of alkaloids present in this plant, change both between the Rauwolfia species and between the different strains of R. vomitoria which can be used as a potent source to treat Hypertension.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false.