Tag: classification of threatened species

Questions Related to classification of threatened species

Introduction of alien species into new area poses a threat to extinction of indigenous species due to 

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

  1. their high nutrient requirement

  2. their symbiotic relationship

  3. absence of their natural predators

  4. more intraspecific competition.

Show answer
Correct Option: C
Explanation:

In the absence of their natural predators, exotic species flourish better and pose a threat to indigenous species.

Which of the following birds has become extinct?

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

  1. Ostrich

  2. Kiwi

  3. Dodo

  4. Tern

Show answer
Correct Option: C
Explanation:

Dodo was a flightless bird that was endemic to the island of Mauritius and east of Madagascar. The bird got extinct in the years 1688-1700 due to hunting on a large scale for its meat. Thus the correct answer is option C. 

Amongst the animals groups given below, which one has the highest percentage of endangered species? 

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

  1. Insects

  2. Mammals

  3. Amphibians

  4. Reptiles

Show answer
Correct Option: C
Explanation:
According to the IUCN regional red listing guidelines, 12% all the birds species, 23% all mammals species, 31% all gymnosperms species and 32% all amphibian species in world face the threat of extinctions and have a highest percentage of endangered species, and the threats including habitat loss, fragmentation and degradation, pollution, climate change, and invasive alien species.
So, the correct answer is ‘Amphibians’.

The extinction of passenger pigeon was due to 

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

  1. increased number of predatory birds.

  2. over exploitation by humans.

  3. non-availability of the food

  4. bird flu virus infection.

Show answer
Correct Option: B
Explanation:

The passenger pigeon or wild pigeon (Ectopistes migratorius) is an extinct species of pigeon that was endemic to North America. Its common name is derived from the French word passager, meaning "passing by", due to the migratory habits of the species. The scientific name also refers to its migratory characteristics. The morphologically similar mourning dove (Zenaida macroura) was long thought to be its closest relative, and the two were at times confused, but genetic analysis has shown that the genus Patagioenas is more closely related to it than the Zenaida doves. The main reasons for the extinction of the passenger pigeon were the massive scale of hunting, the rapid loss of habitat, and the extremely social lifestyle of the bird, which made it highly vulnerable to the former factors. Deforestation was driven by the need to free land for agriculture and expanding towns, but also due to the demand for lumber and fuel. Though there are still large woodland areas in eastern North America, which support a variety of wildlife, it was not enough to support the vast number of passenger pigeons needed to sustain the population.  As the flocks dwindled in size, the passenger pigeon population decreased below the threshold necessary to propagate the species.

So the correct option is 'over exploitation by humans'.

According to biological view, ultimate fate of all species is

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

  1. Live for ever

  2. Destruction

  3. Dead

  4. Extinction

Show answer
Correct Option: D

Autecology deals with

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

  1. Ecology of species

  2. Ecology of many species

  3. Ecology of community

  4. All the above

Show answer
Correct Option: A

Salamanders are found in the forest area of?

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

  1. Adilabad Dist

  2. Kurnool Dist

  3. Visakhapatnam Dist

  4. Chittoor Dist

Show answer
Correct Option: A

A similarity among black buck, gharial and rhinoceros and marsh crocodile is that they are

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

  1. Endangered species

  2. Oviparous

  3. Animals with thick chitinous skin

  4. Found in forests of north-East India

Show answer
Correct Option: A
Explanation:

The similarity between black buck, gharial, rhinoceros and marsh crocodile is that they all are endangered species as they are likely to extinct in near future.

Match Column I with Column II and select the correct option from the codes given below.

Column I Column II
(a) Endemic species (i) Species that exist in very small number
(b) Endangered species (ii) Species found exclusively in a particular area
(c) Vulnerable species (iii) Species that are likely to become endangered
(d) Rare species (iv) Species that are likely to get extinct in the near future
biology main natural resources classification of threatened species red data book conservation of wildlife

  1. a- (ii), b- (iii), c- (i), d- (iv)

  2. a- (iv), b- (ii), c- (iii), d- (i)

  3. a- (iii), b- (i), c- (ii), d- (iv)

  4. a- (ii), b- (iv), c- (iii), d- (i)

Show answer
Correct Option: D
Explanation:

An endemic species is a plant or animal species with a habitat restricted to one area. An endangered species is a species which are less in number and can be extinct in near future. A vulnerable species is a species of animals or plants, which are likely to become endangered unless something changes. A rare species is a group of organisms that are very uncommon, scarce, or infrequently encountered. Thus, the correct answer is option D.


Which of the following is an extinct species?

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

  1. Duck

  2. Dodo

  3. Dinosaur

  4. Both B and C

Show answer
Correct Option: D
Explanation:

The dodo (Raphus cucullatus) is an extinct flightless bird that was endemic to the island of Mauritius, east of Madagascar in the Indian Ocean. About 65 million years ago the greatest mass extinction in earth history occurred, resulting in the loss of the dinosaurs.

Therefore, the correct answer is option D.