Why animals of birds migrate?
Migration can be due to unfavourable environmental conditions. Migration is also done for better food or water availability in other regions due to temperature and other climatic conditions. Some species of animals and birds also migrate for the purpose of reproduction e.g. fresh waterweeds go to saltwaters from freshwater to lay eggs.
Make a list of threatened animals. Write causes of becoming endangered.
Threatened animals are :
(i) Blue Whale : It is hunted for oil and the blubber, which are used for making medicines, so it is endangered.
(ii) African Elephant : They are endangered because they are hunted for their ivory.
(iii) Sea Turtle : The turtles are used to make many things. Its shell is used to make jewellery, combs and sun glasses. Thus their killing is making them endangered.
(iv) Bengal Tiger : Tiger is killed for its skin and bones.
(v) Black Rhino : It is mainly killed for its horn, which are used for making handle of draggers. The main cause of threat is the destruction of their habitats.
What is poaching? How is it done by anti-social elements and for what purpose?
Illegal hunting of animals is called poaching. Poachers hunt the animals for selling their skin, horn, fur and hides. All valuable parts of these animals are used for various purposes and are sold at very high prices.
Uses for ornaments : The bones and other parts like trunks of elephants etc. are used to make ornaments.
Uses in medicines : The horns and bones of some animals like rhinoceros and tigers are used to prepare some traditional medicine specially in Asian countries.
For wall hanging and clothings : The skin, fur and hides are used for the clothing and wall hangings.
What are the Biosphere reserves? What are the objectives of setting up Biosphere Reserves?
Biosphere reserve is a protected area developed to conserve biodiversity.
The objectives of setting up Biosphere Reserves are :
(i) To maintain the biodiversity of the area
(ii) To conserve wild life, plant and animal resources and traditional life of the tribals living in the area.
(iii) To educate, train and create awareness about environmental aspects and eco-friendly living.
What do you mean by Endemic Species? Write about any three species endemic to India.
Species of animals and plants confined to certain specific geographical areas are called endemic species. Following are the three species of animals endemic to India.
(i) Lion-tailed macaque : It is endemic to south-west India is one of the most threatened primates.
(ii) Asiatic lion : Asiatic lion is endemic to Gir National Park, Gujarat .
(iii) Nilgiri ibex : These are endemic to Nilgiri Hills and the Southern position of the Western Ghats range in Tamil Nadu and Kerala.
Switch
