Table of Contents
Wildlife conservation is the process of safeguarding wildlife species and their habitats in order to keep them healthy and prevent them from becoming extinct. To put it another way, plant and animal conservation. This method entails restoring, protecting, and improving activities in order to preserve a natural environment.
A variety of important enlightening themes have been explored in class 8 science chapter 7 ‘Conservation of Plants and Animals.’ Although students will need to prepare this lesson using other study materials, this PDF file will make it easier for them to grasp the subject. Students should read NCERT Exemplar Solutions for class 8 science chapter 7 in preparation for their exams. You may also download Class 8 Maths to improve your exam results.
Class 8 Science Chapter 7 Problem questions and NCERT Exemplar Solutions
The seventh chapter of class 8 NCERT science solutions includes both subjective and objective questions. There are a few key questions and answers that are presented in the NCERT Exemplar Solutions for class 8 science chapter 7.
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Access Answers to the NCERT Exemplar Class 8 Science Chapter 7 – Conservation of Plants and Animals
Multiple Choice Questions
- Wild buffalo is an endangered species because
(a) its population is diminishing
(b) it has become extinct
(c) it is found exclusively in a particular area
(d) its poaching is strictly prohibited
Answer –
The answer is (a) its population is diminishing
Explanation:
Endangered species are defined by a rapid decline in their population, putting them at risk of extinction in the foreseeable future.
- Which one of the following changes may occur due to desertification?
(a) Increased chances of floods.
(b) Conversion of fertile land into a desert.
(c) The decrease in atmospheric temperature.
(d) Increase in water holding capacity of the soil.
Answer –
The answer is (b) Conversion of fertile land into a desert.
Explanation:
In the absence of trees, soil can be carried away by the wind due to the lack of roots to anchor it. This leads to topsoil erosion, ultimately resulting in the transformation of the land into a desert.
- Which one of the following statements is true about a Biosphere Reserve?
(a) It is a protected area where only endemic species live.
(b) It is meant only for the conservation of plants and animals.
(c) It is meant to conserve both the biodiversity and the culture of that area.
(d) There are no other protected areas within its limits.
Answer –
Answer is (c) It is meant to conserve both, the biodiversity and the culture of that area.
Explanation:
The biosphere reserve is the protected part of the land covered with forests. It is meant for the conservation of wildlife, biodiversity and traditional lifestyle of tribals.
- The place meant for the conservation of biodiversity in their natural habitat are
(i) Zoological garden
(ii) Botanical garden
(iii) Wildlife sanctuary
(iv) National park
(a) i & ii;
(b) ii & iii;
(c) iii & iv;
(d) i & iv
Answer –
Answer is (c) iii & iv;
Explanation:
A biosphere reserve is a designated area of land primarily covered with forests, established to conserve wildlife, biodiversity, and the traditional lifestyle of indigenous tribes.
- Which one of the following statements is true about endemic species?
(a) They are found exclusively in a specific habitat.
(b) Endemic species can never become endangered.
(c) They are found only in zoos and botanical gardens.
(d) They are not affected by the destruction of their habitat.
Answer –
Answer is (a) They are found exclusively in a specific habitat.
Explanation:
Endemic species are exclusively found in a particular habitat. These species face the risk of extinction when their habitat is destroyed by human activities or when new species are introduced into their environment.
- Which of the following feature is correct for a wildlife sanctuary?
(a) It is an artificially created protected area for animals.
(b) It is a protected area for threatened and endangered wild animals.
(c) It is meant for the conservation of only plant species.
(d) Capturing and poaching of animals is strictly prohibited here.
Answer –
Answer is (a) It is an artificially created protected area for animals.
Explanation:
A wildlife sanctuary is an established protected area designed to safeguard wild animals in their natural habitat. Activities such as killing (poaching) or capturing of animals are strictly forbidden within these designated areas.
- Which statement is incorrect about endangered species?
(a) Their number has decreased drastically.
(b) They might become extinct in the near future.
(c) They pose a danger to other animals.
(d) Their natural habitat needs to be protected
Answer – (c) They pose a danger to other animals.
- What do blackbuck, elephant, python and golden cat together represent in a forest?
(a) fauna
(b) flora
(c) ecosystem
(d) species
Answer –
Answer is (a) fauna
Explanation:
Blackbuck, elephant, python, and golden cat collectively represent the fauna in a forest. Fauna refers to the animals specific to a particular area. Flora, on the other hand, pertains to the plant life in a given region. The ecosystem comprises all living organisms within an area and their physical surroundings. A species is defined as a group of populations capable of interbreeding.
- The Red Data Book keeps a record of all the
(i) endemic species.
(ii) extinct species.
(iii) endangered plants
(iv) endangered animals.
(a) i & ii;
(b) ii & iii;
(c) iii & iv;
(d) i & iv
Answer – (c) iii & iv
Explanation:
The Red Data Book serves as a comprehensive record documenting endangered animals and plants. It includes separate editions for plants, animals, and other species, providing crucial information for conservation efforts.
- Migratory birds fly to faraway areas during a particular time of a year. Which of the following conditions present in their habitat during that time are responsible for this behaviour?
(i)Unavailability of food.
(ii) Extreme weather conditions.
(iii) Overcrowding.
(iv) Lack of nesting areas.
(a) ii & iii;
(b) i & ii;
(c) i & iv;
(d) ii & iv.
Answer –
Answer is (b) i & ii;
Explanation:
Migration in birds refers to the movement from one location to another in response to climatic changes. This behavior serves as an adaptation to avoid extreme weather conditions and scarcity of nesting sites. Birds undertake these journeys, including laying eggs, when their natural habitat becomes inhospitable due to adverse weather conditions.
- In our country, large patches of forests are being cleared for cultivation of crops. The environmental impact of such a practice will lead to
(a) soil erosion
(b) soil conservation
(c) soil pollution
(d) soil fertility
Answer –
Answer is (a) soil erosion
Explanation:
The absence of trees resulting from deforestation leads to a lack of roots to anchor the soil, causing topsoil erosion due to the effects of wind.
Very Short Answer Questions
- Why is it important to conserve forests?
Answer –
Conserving forests is crucial because they:
- Regulate the level of CO2 in the atmosphere.
- Stabilize the topsoil, enhancing its fertility.
- Aid in absorbing rainwater, mitigating flood risks.
- Sustain the water cycle.
- Provide a natural habitat for diverse species.
- Mention any one action that you have undertaken to conserve trees
Answer –
I actively participate in afforestation initiatives, raising awareness about individual actions for tree conservation, such as recycling paper, planting trees on special occasions, and more.
- State whether the following statements are True or False. Correct the false statements.
- There can be a wildlife sanctuary within a biosphere reserve.
- Plants of a particular area are collectively termed as fauna.
- Deforestation leads to an increase in the water holding capacity of the soil.
- Bison is an endemic fauna of Pachmarhi Biosphere Reserve.
Answer –
- True.
- False- Plants of a particular area are collectively termed as flora.
- False- Deforestation leads to a decrease in the water holding capacity of the soil.
- True.
- Can a forest regenerate naturally in a short period of time?
Answer –
Reforestation, or the regeneration of a forest, can occur naturally by leaving deforested areas undisturbed for a period of time. This allows the area to restore itself through the natural growth of trees, without human interference. However, this process can be lengthy, often measured in years.
- Name the first Reserve Forest of India.
Answer –
Satpura National Park.
Short Answer Questions
- Why are wildlife sanctuaries important for the conservation of plants and animals?
Answer –
Wildlife sanctuaries play a critical role in the conservation of plants and animals due to the prohibition of poaching, killing, and disturbing wildlife through human activities. These protected areas enable animals to thrive in their natural environment, promoting their breeding and population growth.
- Why are endemic organisms in greater danger of becoming extinct?
Answer –
Endemic organisms are species that are uniquely adapted to a specific geographical area. Disturbances to their natural habitats can have severe consequences, placing them at risk of extinction.
- How are even small animals important in an ecosystem?
Answer –
Each organism plays a vital role in the food chain and ecosystem, contributing to the balance of the environment.
- A new species X is introduced in a forest. How is it likely to affect the local species of that area?
Answer –
The introduction of new species into a forest can result in competition for resources and habitat, impacting the native species already inhabiting the forest.
- Does soil erosion affect the fertility of soil? How?
Answer –
Soil erosion results in the loss of the fertile topsoil layer, which can ultimately lead to desertification of the land due to the lack of fertile soil.
- What is the unique feature of the biodiversity found in Panchmarhi Biosphere Reserve?
Answer –
The biodiversity observed in the Panchmarhi Biosphere Reserve is comparable to the variety of life found in the upper Himalayan peaks and the lower Western Ghats.
- Mention the aim of Forest (Conservation) Act.
Answer –
The objective of the Forest (Conservation) Act is to safeguard and conserve natural forests while addressing the fundamental needs of individuals residing in or near these forested areas.
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- What is biodiversity?
Answer –
Biodiversity, also known as Biological diversity, encompasses the range of organisms present on Earth, their interactions with each other, and their connection to the environment.
Long Answer Questions
- Is deforestation associated with global warming? Explain.
Answer –
Plants utilize carbon dioxide from the atmosphere for photosynthesis. When large numbers of trees are cut down due to deforestation, fewer trees remain to absorb carbon dioxide, leading to an increase in atmospheric CO2 levels. This excess CO2 traps heat rays from the sun reflected by the Earth, causing a greenhouse effect and raising the temperature of the Earth’s atmosphere. This gradual increase in overall temperature due to the greenhouse effect, driven by increased CO2 levels in the atmosphere, is known as global warming. Therefore, deforestation is strongly linked to global warming.
- How does deforestation lead to frequent floods and droughts?
Answer –
When forests are cut down, fewer trees remain to release water vapor into the atmosphere through transpiration. This reduction in water vapor leads to less rainfall in the area. Consequently, less water percolates into the ground, causing groundwater levels to decrease. Persistent low rainfall can result in droughts due to a shortage of surface water and groundwater.
Deforestation also reduces the soil’s water-holding capacity, as there are no roots to absorb rainwater. This reduces the movement of water from the soil surface into the ground, leading to floods. Soil erosion caused by deforestation further contributes to floods, as the eroded soil collects on river beds, reducing their depth. This can cause overflow during heavy rains.
Class 8 Science Solutions Chapter 7 Conservation of Plants and Animals FAQs
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