Which of the following statements is/are incorrect?

a. 99 percent of the species that have ever lived on earth are now extinct. b. The average half-life of species is estimated between ten to twenty million years.

Which of the following statements is/are correct?

a. An endangered species is a native species that faces a significant risk of extinction in the near future. b. Survival of the endangered species is not assured as their population has been greatly reduced. c. Population of endangered species can be saved by introducing exotic species in the ecosystem which will ensure natural succesion.

Which of the following have been classified as threatened species by the International Union of Conservation of Nature and Natural Resources (IUCN)?

a. Exotic species b. Endangered species c. Endemic species d. Vulnerable species e. Rare species

Which of the following is not an endangered species in India?

Which of the following statements is/are correct about different types of biodiversity?

a. Genetic diversity is essential for a healthy breeding of population of species. b. Species diversity relates to the number of species in a defined area. c. Areas rich in ecosystem diversity are called hotspots of diversity.

Which of the following reasons are correct for some species becoming endangered?

a. Poaching b. Introduction of new species in th ecosystem c. Over exploitation of resources d. Presence of hotspots

Which of the following is/are rare species?

a. Bambuseae b. Humbodtia decurrens Bedd c. Ficus microcarpa

Which of the following statements is/are correct?

a. 85 per cent of the plants and animals in Hawai are found nowhere else in the world. b. Madagascar has many plants and animals that are threatened by introduced species and land development. c. There are mega diversity centres in 12 countries situtated in tropics.

Why did the Government of India introduce the Wild Life (Protection) Act, 1972?

The Red List of species published by IUCN classifies

Conservation of biodiversity is important for

Which of the following statements is/are correct about rare species?

a. The population of rare species is very small in the world. b. They are confined to limited areas. c. They are thinly scattered over a wider area.

Which of the following statements is/are incorrect?

a. Biodiversity helps in understanding how life functions and the role of each species in sustaining ecosystems. b. Biodiversity guides us about how life evolved and how it will continue to evolve. c. An ecosystem with more species becomes unstable.

The Government of India along with 155 other nations signed a conservation strategy at the Earth Summit held at Rio de Janeiro, Brazil in June 1992. What is this conservation strategy called?

Which of the following sentences is/are incorrect?

a. Species that are introduced in the ecosystem are vulnerable species. b. Vulnerable species are likely to be in danger of extinction in near future if the factors threatening to their extinction continue. c. Survival of these species is not assured as their population has been greatly reduced.