Ques. Which of the following countries has the highest biodiversity?
(a) Brazil (b) South Africa (c) Russia (d) India
Thinking Process
Ans. (a)
Sol. Climate of countries tropical latitude like Brazil climate remain relatively undisturbed, constant and predictable giving tune for diversification, which favours rich biodiversity.
Ques. Which of the following is not a cause for loss of biodiversity?
(a) Destruction of habitat (b) Invasion by alien species (c) Keeping animals in zoological parks (d) Over-exploitation of natural resources
Ans. (c)
Sol. Keeping animals in zoological parks is not a cause for loss of biodiversity.
(i) Destruction of natural habitat (primary cause).
(ii) Introduction of exotic (alien species) with indigenous species.
(iii) Over exploitation of natural resources.
(iv) Co-extinction of species.
Ques. Which of the following is not an invasive alien species in the Indian context?
(a) Lantana (b) Cynodon (c) Parthenium (d) Eichhornia
Ans. (b)
Sol. Cynodon (doob grass) is not an invasive alien species.
Ques. Where among the following will you find pitcher plant?
(a) Rain forest of North-East India (b) Sunderbans (c) Thar desert (d) Western ghats
Sol. Pitcher plant (Nepenthes) an insectivorous plant is found in rain forest of North-East India.
These type of plants generally grow in nitrogen deficient soil.
Sunderbans are rich in fauna and flora.
Mangroove plants are the characteristic of Sunderbans.
Western ghats are rich in biodiversity.
Xerophytes are more common in thar deserts.
Ques. Which one of the following is not a feature of biodiversity hotspots?
(a) Large number of species (b) Abundance of endemic species (c) Mostly located in the tropics (d) Mostly located in the polar regions
Ans. (d)
Sol. Biodiversity hotspots are characterised by large number of flora and fauna, abundance of endemic species and also large number of alien or exotic species.
Ques. Match the following columns.
Ques. to be continued
Choose the correct match form the following
(a) i-a, ii-c, iii-b, iv-d (b) i-d, ii-c, iii-a, iv-b (c) i-c, ii-a, iii-b, iv-d (d) i-c, ii-a, iii-d, iv-b
Sol. Dodo - Mauritius
Quagga - Africa
Thylacine - Australia
Stellar’s sea cow - Russia
Rest of the given set of extinct animals matched with the provided countries are not true.
Ques. What is common to the following plants Nepenthes, Psilotum, Rauwolfia and Aconitum?
(a) All are ornamental plants (b) All are phylogenic link species (c) All are prone to over exploitation (d) All are exclusively present in the Eastern Himalayas
Sol. All of the above plants are prone to over exploitation due to their respective properties.
Ques. The one-horned rhinoceros is specific to which of the following sanctuary?
(a) Bhitar Kanika (b) Bandipur (c) Kaziranga (d) Corbett Park
Sol. Kaziranga National Park is situated in Golaghat and Nagaon districts of (Asom).
One horned rhinocerosis specific to this park.
While Corbett National Park is situated in district Nainital (Uttarakhand) and is specific for tiger.
It is the first National Park of India, which is famous for tigers.
Sol. to be continued
Ques. Amongst the animal groups given below, which one has the highest percentage of endangered species?
(a) Insects (b) Mammals (c) Amphibians (d) Reptiles
Sol. Amphibians have the highest percentage presently, $32 \%$ of all amphibian species in the world face the threat of extinction.
Ques. Which one of the following is an endangered plant species of India?
(a) Rauwolfia serpentina (b) Santalum album (sandal wood) (c) Cycas beddonei (d) All of the above
Sol. All of the above mentioned plants are endangered plant species of India.
Ques. What is common to Lantana, Eichhornia and African catfish?
(a) All are endangered species of India (b) All are key stone species (c) All are mammals found in India (d) All the species are neither threatened nor indigenous species of India.
Sol. All the three above mentioned species are neither threatned nor indigenous species of India.
Ques. The extinction of passenger pigeon was due to
(a) Increased number of predatory birds (b) Over exploitation by humans (c) Non-availability of the food (d) Bird flu virus infection
Sol. Extinction of passenger pigeon (Ectopistes migratorius) was due to over exploitation by human beings.
Ques. Which of the following statements is correct?
(a) Parthenium is an endemic species of our country. (b) African catfish is not a threat to indigenous catifishes. (c) Steller's sea cow is an extinct animal. (d) Lantana is popularly known as carrot grass.
Sol. Stellar’s sea cow (from Russia) is a recently extinct animal.
African catfish is also an alien species which adversly affects the growth of indigenous Clarias batrachus - our local species.
Lantana camara, another alien species, is also strongly competing with native species.
Ques. Among the ecosystem mentioned below, where can one find maximum biodiversity?
(a) Mangroves (b) Desert (c) Coral reefs (d) Alpine meadows
Sol. Coral reefs are the most productive ecosystem $\left(2000-6000 \mathrm{kcal} / \mathrm{m}^{2} / \mathrm{y}\right)$ and form the most diverse part of costal region providing a home to fish molluscs, crustaceans sponges, cnidarians, etc.
Ques. Which of the following forests is known as the ‘Lungs of the planet Earth’?
(a) Taiga forest (b) Tundra forest (c) Amazon rain forest (d) Rainforests of North-East India
Sol. Amazon is a rain forest that covers most of the Amazon basin of South America and teritory including nine nations.
Taiga forest, present in broad belt of Northern hemisphere, represents the largest terrestrial biome.
Tundra forest is a biome where tree growth is hindered by low temperature and short growing season.
Rain forests of North-East India are tropical forests with a natural reservoir of genetic diversity.
Ques. The active chemical drug reserpine is obtained form
(a) Datura (b) Rauwolfia (c) Atropa (d) Papaver
Sol. Rauwolfia vomitoria is the source of active chemical drug reserpine, which is prescribed in hypertension and act as tranquilliser.
Ques. Which of the following group exhibit more species diversity?
(a) Gymnosperms (b) Algae (c) Bryophytes (d) Fungi