DAV Class 8 Science Solution Chapter 8 Conservation of Plants and Animals
DAV School Books Class 8 Science Solution Chapter 8 Conservation of Plants and Animals all Question Answer. DAV Class 8 8th Chapter Conservation of Plants and Animals full Chapter explanation by expert teacher.
DAV School Books Class 8 Science Solution Chapter 8 Conservation of Plants and Animals
A.) Fill in the blanks.
1.) International Day for biological diversity is observed on ___________.
2.) A group of organisms, capable of interbreeding under natural conditions, is known as a ___________.
3.) ___________ species are the species that are found only in a particular area.
4.) ___________ is an important reserve for Project Tiger.
5.) ___________ sanctuary in Odisha is the breeding ground for the ‘giant olive ridley turtle’ which migrate here from the Pacific Ocean.
Answer: (1) May 22 (2) species (3) endemic (4) Bandipur National Park (5) Gahirmatha Turtle
B.) Match the following
1. Rhinoceros | a. vulnerable |
2. Giant Panda | b. Kaziranga national park |
3. Flamingos | c. extinct |
4. Cheetah | d. endangered |
5. Passenger pigeon | e. migration |
Answer: (1) b (2) d (3) e (4) a (5) c
C.) Tick the correct option.
1.) Protection, and preservation of wildlife and natural resources, is known as-
Answer: conservation
2.) The cheetah is a vulnerable species because-
Answer: it will be ‘extinct soon.
3.) Plants, found in a particular area, are referred to as-
Answer: flora
4.) Which one of the following is not an outcome of deforestation in an area?
Answer: increased rainfall.
5.) A region, in which ‘conservation of biodiversity’ in its natural habitat is practised, is known as a-
Answer: national park
D.) Answer the following questions in brief.
1.) How have ‘urbanisation and industrialisation’ led to a large scale deforestation’?
Answer: Urbanization and industrialisation have caused clearing of lens to make space for industries as well as housing also this has increased the need for several other products that are derived from the forest such as people and furniture and medicines as a result deforestation has increased in great proportion
2.) A new species X is introduced in a forest. How is it likely to affect the local species of the area?
Answer: It might affect the forest in the following ways –
- It’s possible that the local species won’t have access to adequate food, water, and shelter and as a result might perish
- They might feed off the local wildlife, decreasing the population of a particular species
- It might alter the food web or food chain.
- Some species might get extinct.
3.) What is a Biosphere Reserve? Name two biosphere reserves in India.
Answer:UNESCO has dedicated specific areas without protected from human activities and support sustainable development of plants and animals in their Natural Habitat are known as Biosphere Reserves
Nilgiri and Nanda Devi Biosphere are two of India’s most important biospheres
4.) How does the ‘Red data book’ help in protecting biodiversity?
Answer:The red data book was formed to document animals plants and microorganism and their species that are either about to be extinct or already are extinct it is book helps us understanding the species that are still there and need protection
5.) Why do some birds and animals migrate?
Answer: Some birds and animals must migrate in order to find plenty of food and a good location for breeding.
6.) How do birds ‘get helped’ in navigation while undertaking long distance flights?
Answer: Birds have a very good vision and good memory of roots and geographical location other than that birds use age old navigation techniques such as the sun and the star to determine the direction they also have a unique sense of understanding and interpreting the Earth’s magnetic field
7.) Distinguish between a National Park and a Wildlife Sanctuary.
Answer:National Park no human activities such as grazing and cattle rearing are allowed where is in Wildlife sanctuaries human activities are permitted to some extent National Park also have well defined boundaries where is Wildlife sanctuaries do not have any such boundaries National Park are open to public on certain locations where as Wildlife sanctuaries are opened to public always
E.)
1.) Explain how deforestation can result in droughts and floods.
Answer: It is scientifically proven that the roots of a tree help the soil to be packed as a result floods cannot wash away the soil however deforestation has result to frequent floods and route thus whenever there is a heavy rainfall the soil is washed away and result in floods.
2.) ‘Extinction of tiger can destabilise the entire forest ecosystem and result in a large-scale loss of biodiversity.” Justify this statement.
Answer: Tiger is a carnivorous creature and the food chain will be affected if the tiger is removed from it the animals that are herbivorous will increase in number and the plans will be eaten more frequently at one point of time there might be shortage of plants or food for these herbivorous animals and as a result species might get extinct.
3.) Why are endemic species at a greater risk of becoming extinct? List the human action related causes’ that are responsible for their extinction.
Answer: Species are found in certain geographical locations and protecting them is very important because if we are not protected they are at height risk of getting extinct the main reasons of the extinction are loss of Habitat their exploitation for their skin and other features or in fact introduction of new year species into the ecosystem
4.) “The growing human population poses a grave threat to biodiversity”. Justify this statement.
Answer: With the increase in human population there has been a constant need for land as well as other product such as paper and wood that are obtained from forest if deforestation keeps on occurring and forest are being cleared it my result to Habitat loss and extension of many species does it would affect the biodiversity significantly
5.) Explain the difference between extinct, endangered and vulnerable species.
Answer: Extinct, endangered, and vulnerable species differ in that:
Extinct: A plant or animal that is no longer present on the planet is considered to be extinct.
A plant or animal species that is in danger of going extinct soon is considered endangered.
Vulnerable: Species that can only be found in a single geographic location and nowhere else are considered to be vulnerable.
6.) List five ways in which you, as an individual, can contribute to conserving forests and wildlife.
Answer: By planting more trees and encouraging afforestation and reforestation by recycling paper , reducing its wastage, using more of renewable resources of energy such as wind energy and solar energy as well as make people aware about the usefulness of reducing environment pollution are ways we can contribute.