Tag: environmental equilibrium

Questions Related to environmental equilibrium

Select the correct term for the following definitions (i, ii, iii, iv).
(i) The taxon is liable to become extinct if not allowed to realise its full biotic potential by providing protection from exotic species/human exploitation/ habitat deterioration/ depletion of food.
(ii) The taxon has been completely eliminated or died out from earth, e.g., Dodo.
(iii) The taxon is facing a high risk of extinction in the wild in the near future due to decrease in its habitat, excessive predation or poaching.
(iv) They are species with naturally small populations, either localised or thinly scattered, which are always at risk from pests/pathogens/predators/exotic species.

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. (i) - Threatened; (ii) - Extinct; (iii) - Endangered; (iv) - Rare

  2. (i) - Endangered; (ii) - Extinct; (iii) - Threatened; (iv) - Rare

  3. (i) - Extinct; (ii) - Rare; (iii) - Threatened; (iv) - Endangered

  4. (i) - Threatened; (ii) - Extinct; (iii) - Rare; (iv) - Endangered

Show answer
Correct Option: A
Explanation:

(i) A threatened species is a plant, animal, or other living organism that is becoming rare and that may become in danger of extinction if current trends continue. The international Union for the Conservation of Nature (IUCN) divides threatened species into three categories: vulnerable species, endangered species and critically endangered species. The US National Wildlife federation on the other hand, distinguishes between threatened and endangered species.

(ii) Extinction of a particular animal or plant species occurs when there are no more individuals of that species alive anywhere in the world - the species has died out. This is a natural part of evolution. But sometimes extinctions happen at a much faster rate than usual.
(iii) An endangered species is a species which has been categorized as very likely to become extinct. Endangered (EN), as categorized by the International Union for Conservation of Nature (IUCN) Red List, is the second most severe conservation status for wild populations in the IUCN's schema after Critically Endangered (CR). Many nations have laws that protect conservation-reliant species: for example, forbidding hunting, restricting land development or creating preserves. Population numbers, trends and species' conservation status can be found at the lists of organisms by population.
(iv) A rare species is a group of organisms that are very uncommon, scarce, or infrequently encountered. This designation may be applied to either a plant or animal taxon, and is distinct from the term endangered or threatened. Designation of a rare species may be made by an official body, such as a national government, state, or province. The term more commonly appears without reference to specific criteria. The IUCN does not normally make such designations, but may use the term in scientific discussion. Rarity rests on a specific species being represented by a small number of organisms worldwide, usually fewer than 10,000. However, a species having a very narrow endemic range or fragmented habitat also influences the concept. Almost 75% of known species can be classified as "rare'.
So the correct option is '(i)- threatened, (ii)- extinct, (iii)- endangered, (iv)- rare'.

Migration is an

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Annual event

  2. Biannual event

  3. Quarterly event

  4. All of the above

Show answer
Correct Option: A
Explanation:

The correct answer is 'annual event'

Migration done by birds is usually dome during winters in search of a warmer environment and food. Since winters are only one of the 4 seasons of a year, migration only occurs during winters and thus only once a year.

Which of the following migration of population does not change the size of the population?

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. External migration

  2. Internal migration

  3. International migration

  4. National migration

Show answer
Correct Option: B

Siberian crane is a regular visitor of bird sanctuary of

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Ranganathittu (Karnataka)

  2. Bharatpur (Rajasthan)

  3. Vedanthangal (Tamil Nadu)

  4. Lalbagh (Karnataka)

Show answer
Correct Option: B
Explanation:

Ghana bird sanctuary national park is located in Bharatpur district in Rajasthan. Every year during winters when the temperature in Siberia becomes very low, migratory birds like Siberian crane from Siberia, reach this national park for breeding.

Which of the following characteristics of tiger helps to reduce the poaching of the tiger? 

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Whiskers of tiger help to sense the prey.

  2. The ears are flexible which carries the sound from large distances.

  3. Tigers can smell the urine of another tiger.

  4. All of the above.

Show answer
Correct Option: D

Jim Corbett National Park is located in 

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Uttarakhand

  2. Madhya Pradesh

  3. Bihar

  4. None of the above

Show answer
Correct Option: A

The people who kill the animals are known as

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Poachers

  2. Inhabitants

  3. Immigrants

  4. All of the above

Show answer
Correct Option: A

People who kill animals are called 

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Poachers

  2. Hunters

  3. Forest Officer

  4. Both A and B

Show answer
Correct Option: D
Explanation:
  1. people kills the animals are called poachers and hunters as they usually leads to the selling of the killed animal. 
  2.  Forest Officer who holds the responsibility to safeguard the forests from illegal cutting and poaching of flora and fauna of the area under his jurisdiction. So option D is correct.

Which of the following is a correct statement?

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Musk deer are killed to make a little scent from its musk.

  2. Rhinoceros are killed for its horn.

  3. Crocodiles are killed for their skins.

  4. All of the above

Show answer
Correct Option: D
Explanation:
  • Musk deer belong to the family Moschidae. To obtain deer musk, the deer is killed and its gland also called "musk pod", is removed. They are killed to make a little scent from its musk. Hence Musk deer are killed to make a little scent from its musk.
  • A rhinoceros belong to the family Rhinocerotidae Rhinoceros are killed by some humans for their horns, which are bought and sold on the black market, and used by some cultures for ornaments or traditional medicine. East Asia, specifically Vietnam, is the largest market for rhino horns. Hence Rhinoceros is killed for its horn.
  • Crocodiles or true crocodiles are large semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas, and Australia. They are killed for their skin. Their skin is used to manufacture high-quality leather.
  • So, the correct answer is 'All the above'.

'Ornithology' deals with

commercial applications environmental equilibrium threatened species need of conservation conservation of soil and wild life sleeping time animal senses sense organs in animals

  1. Study of birds

  2. Study of Insects

  3. Origin of species

  4. Study of trees

Show answer
Correct Option: A
Explanation:

Study of birds comes under Ornithology.

Study of insects is called Entomology.
Study of trees or wooded plants is called Dendrology.

So correct answer is 'Study of birds'.