Answer: Option B. -> False
:
B
A species is a groupof similar organisms which can interbreed and produce fertile offsprings. Amuleis the result of a cross between a male donkey and a female horse. Mostmulesare sterile. Hence, mule is not a species.

Answer: Option B. -> Biodiversity
:
B
Biodiversity refers to the variety of organisms existing on the earth, their interrelationships and their relationship with the environment. Biodiversity or Biological diversity is a term that describes the variety of living beings on earth. It helps in maintaining the balance of the ecosystem.

Answer: Option D. -> All of these
:
D
The following measures can be taken to reduce the environmental effects of deforestation:
(i) Recycling and reducing use: It takes 17 full grown trees to make one tonne of paper, hence reusing paper will reduce the need to cut down more trees. Using resources in a sustainable way i.e. reducing demand can help reducing deforestation.
(ii) Reforestation: Planting trees in deforested lands can help restore the area to some extent. If the same species of trees, which were cut, are replanted and the area is left undisturbed, the forest should reestablish itself.
(iii) Switching to renewable forms of energy: Reducing the use of firewood and using renewable energy can reduce deforestation.

Answer: Option A. -> Flora of that area
:
A
The sum of plant species in a given area or time is called flora of that area. For example sal, teak, mango, jamun, silver ferns, arjun, etc., are the flora, which means the plant species in that particular area.

Answer: Option D. -> migratory birds
:
D
Birds travelling long distancesseasonally, to reach faraway lands with suitable climate conditions, are called migratory birds. They migrate each year at a particular season to escape from harsh climatic conditions. Examples of migratory birds include the Arctic tern and Siberian crane.

:
Endangered species are species that are under the threat of extinction. This can occur if the rate in which they are reducing in numberis greater than their rate of reproduction. Human activities caused a drastic loss in wildlife habitat, forcing many species such astiger, black rhino, orangutan, etc., to theverge of extinction.

Answer: Option B. -> Bison, Indian giant squirrel, Flying squirrel
:
B
Animals which are native to a particular area are called endemic fauna of that area.The endemic fauna of the Pachmarhi biosphere reserve include bison, Indian giant squirrel and flying squirrel.

Answer: Option A. -> True
:
A
The destruction of habitat, increasing population and introduction of new species disrupts the delicate environmental balance of the ecosystem. This can negatively affect the survival and sustenanceof the native species of the habitat (endemic species) making them endangered species.

Answer: Option C. -> fauna
:
C
Fauna is the animal life occurring in a particular region. The corresponding term for plant life is flora. Blue-bull, barking deer, cheetal, leopard, wild dog andwolf are examples offauna of the Pachmarhi Biosphere Reserve.

Answer: Option A. -> Lists of species whose continued existence is threatened
:
A
Red Data Book contains list of species whose continued existence is threatened. Species are classified into different categories of perceived risk. Each Red Data Book usually deals with a specific group of animals or plants (eg: reptiles, insects, mosses).The Red Data Book contains color-coded information sheets, which are arranged according to the extent the species is in danger.The black coloured sheet for species which are extinct, red coloured sheet for species that are in more danger, amber coloured forspecies, which aregetting attacked by other species, white coloured for very rare species, green coloured forspecies, not in dangerand grey coloured for the species that are intimated to be vulnerable, endangered, or rare.