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Practice each question, then open the answer or worked solution.
Which of the following countries has the highest biodiversity?
Ans: Correct option is a.
Explanation: The great Amazon rain forest located in South America constitutes half of the variety of all the species from the total planet and this there which accounts for nearly one-tenth of the world's biodiversity.
Which of the following is not a cause for the loss of biodiversity?
Ans: Correct option is c.
Explanation: The exploitation of natural resources affects biodiversity in a very significant way and has lasting effects. Horn of rhino, a shield of pangolin, feather of peacock are the most common examples of overexploitation which is one of the factors for biodiversity loss.
Which of the following is not an invasive alien species in the Indian context?
Ans: Correct Option is b
Explanation: Cynodon is a type of grass commonly called doob grass which is a plant species native to India.
Where among the following will you find pitcher plants?
Ans: Correct Option is a.
Explanation: Nepenthes khasiana also known as a species of pitcher plant is commonly found in India. It is mainly seen growing in the rainforests of North- East India (Jaintia hills, Garo hills and the Mawlynnong region of East Khasi hills of Meghalaya.
Which one of the following is not a major characteristic feature of biodiversity hotspots?
Ans: Correct Option is d
Explanation: Biodiversity hot-spots are the places in which specific mainly endangered animals and plants are protected by human care and allowed to reproduce freely. The polar region is extremely unsuitable for many animals as well as plants so it cannot be a biodiversity hot-spot.
Match the animals given in column I with their location in column II:
Column I | Column II | ||
A | Dodo | I. | Africa |
B | Quagga | II. | Russia |
C | Thylacine | III. | Mauritius |
D | Steller's sea cow | IV. | Australia |
Choose the correct match from the following:
Ans: Correct Option is d
Explanation: A. Dodo, now an extinct bird was found in Mauritius,
B. Quagga was a native organism in Africa,
C. Thylacine was primarily found in Australia, and,
D. Steller's sea cow was a native of Russia.
What is common to the following plants: Nepenthes, Psilotum, Rauwolfia
and Aconitum?
Ans: Correct Option is c
Explanation: Since the commencement of human civilization, humans have mostly been dependent on plants. Humans use many plants for various purposes including ornamentals, medicinal and other useful plants. Thus, in one way or other the plants are prone to overexploitation.
The one-horned rhinoceros is specific to which of the following sanctuary
Ans: Correct Option is c
Explanation: One-horned rhino is the major animal species that is near to extinction as there are only a few of these left in the world with us. Thus, a continued effort to save these important animals has been started. There is only one place in the world that is the natural habitat of the animal, and ecologists tried to save these animals in their natural habitat. The one-horned rhino lives in the Kaziranga national park situated in the golaghat district of Assam.
Amongst the animal groups given below, which one appears to be more
vulnerable to extinction?
Ans: Correct Option is c
Explanation: Millions of years of evolution have resulted in every species that exists today. However, due to human activities such as deforestation and other forms of pollution, these species will become extinct over the next two centuries. So, the International Union for Conservation of Nature (IUCN) publishes a book called Red Data Book that informs people about extinct, fragile, and threatened species. There are very tight conditions that must be met in order for a name to be placed in a certain location in this book. Amphibians, according to that book, are the group most threatened by extinction.
Which one of the following is an endangered plant species of India?
Ans: Correct Option is d
Explanation: Rauwolfia serpentina, for example, has therapeutic potential ( secrete reserpine which is a drug of medicinal importance ). Another species, such as cycas, is decorative, resulting in overexploitation, while Santalum is a commercial plant with a unique perfume that is overexploited. As a result, all of the plants listed are endangered.