Tag: classification of threatened species

Questions Related to classification of threatened species

Reasons that the population size of an exotic species often grows rapidly when the species is introduced in a new environment include which of the following?
(i) The exotic species is resistant to pesticides.
(ii) There is a large, underutilised food source in the new environment.
(iii) The exotic species has few natural predators in the new environment.

biology main natural resources classification of threatened species red data book conservation of wildlife

  1. (i) only

  2. (ii) only

  3. (i) and (iii) only

  4. (ii) and (iii) only

Show answer
Correct Option: D
Explanation:
Exotic species are those species which are introduced from distant or foreign region. These species grows very fast as in the new area there are no or less competition for food and space, and also less predators and hence they show rapid reproduction and fast dispersal ability.
So, the correct answer is option D.

Dodo is a

biology main natural resources classification of threatened species red data book conservation of wildlife

  1. Rare species

  2. Extinct species

  3. Endangered species

  4. Vulnerable species

Show answer
Correct Option: B
Explanation:

Dodo was a bird which cannot fly. This bird was found in the regions of Madagascar. The birds were transported by humans to different places. The bird got extinct about in the years of 1688-1700 because they were commonly used as food by the Dutch people. The fossils of the bird were found in the regions near Madagascar. There are cast and molds made of this bird which is present in the museums.

Thus, the correct answer is option B. 

The death of the last individual of a species is called as

biology main natural resources classification of threatened species red data book conservation of wildlife

  1. Extinction

  2. Rare

  3. Endangered

  4. Threatened

Show answer
Correct Option: A
Explanation:

The species that no more exist on earth are known as extinct species Eg. dinosaurs. The species which are on the verge of extinction and which are required to be protected and conserved are known as endangered or threatened species, Eg. tiger. A rare species is a group of organisms that are very uncommon, scarce, or infrequently encountered. Thus, the correct answer is option A.

What is an endangered animal?

biology main natural resources classification of threatened species red data book conservation of wildlife

  1. An animal on the verge of extinction

  2. An animal which is extinct

  3. An animal that is dangerous to humans

  4. An animal that is dangerous to other animals

Show answer
Correct Option: A
Explanation:

  • Endangered species is a species of animals or plants that are at risk of extinction in the near future due to the extensive activities of the human. The number of these species is drastically reduced. 
  • If these species are not conserved or taken care of, then these species will be extinct. 
  • Example, one horned Rhinoceros, Bengal tiger etc

So, the correct answer is 'An animal on the verge of extinction'