Class 11 Geography: Life on the Earth: Biodiversity and Conservation — Chapter Question Set

(d) All organisms — This is the textbook-supported choice for the question.

(d) are suffering from the danger of extinction — This is the textbook-supported choice for the question.

(d) Conservation
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FUNDAMENTALS OF PHYSICAL GEOGRAPHY120 — This is the textbook-supported choice for the question.

(a) Tropical Regions — This is the textbook-supported choice for the question.

(c) Brazil — This is the textbook-supported choice for the question.

d) the basis for the diversity of vegetation and — The textbook states: You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity.

c) the input of solar energy and water — The textbook states: The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water.

b) rich in these inputs are the areas of wide sp — The textbook states: No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity.

a) 2.5 — The textbook states: Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution.

d) in any other period — The textbook states: Before the advent of humans, our earth supported more biodiversity than in any other period.

c) extinction due to overuse — The textbook states: Since, the emergence of humans, however, biodiversity has begun a rapid decline, with one species after another bearing the brunt of extinction due to overuse.

b) 2 million — The textbook states: The number of species globally vary from 2 million to 100 million, with 10 million being the best estimate.

a) 40 per cent — The textbook states: New species are regularly discovered most of which are yet to be classified (an estimate states that about 40 per cent of fresh water fishes from South America are not classified yet).

d) a system in constant evolution — The textbook states: Biodiversity is a system in constant evolution, from a view point of species, as well as from view point of an individual organism.

c) 99 per cent — The textbook states: The average half-life of a species is estimated at between one and four million years, and 99 per cent of the species that have ever lived on the earth are today extinct.

b) fewer and fewer species — The textbook states: As one approaches the polar regions, one finds larger and larger populations of fewer and fewer species.

a) a combination of two words — The textbook states: Biodiversity itself is a combination of two words, Bio (life) and diversity (variety).

d) the number and variety of organisms found wit — The textbook states: In simple terms, biodiversity is the number and variety of organisms found within a specified geographic region.

c) the varieties of plants — The textbook states: It refers to the varieties of plants, animals and micro-organisms, the genes they contain and the ecosystems they form.

b) and between the ecosystems — The textbook states: It relates to the variability among living organisms on the earth, including the variability within and between the species and that within and between the ecosystems.

a) a result of hundreds of millions of years of — The textbook states: It is a result of hundreds of millions of years of evolutionary history.

d) Genetic — The textbook states: Biodiversity can be discussed at three levels : (i) Genetic diversity; (ii) Species diversity; (iii) Ecosystem diversity.

c) the basic building blocks of various life for — The textbook states: Genetic Diversity Genes are the basic building blocks of various life forms.

b) the variation of genes within species — The textbook states: Genetic biodiversity refers to the variation of genes within species.

a) called species — The textbook states: Groups of individual organisms having certain similarities in their physical characteristics are called species .

d) physical appearance, etc., considerably — The textbook states: Human beings genetically belong to the homo sapiens group and also differ in their characteristics such as height, colour, physical appearance, etc., considerably.

c) essential for a healthy breeding of populatio — The textbook states: This genetic diversity is essential for a healthy breeding of population of species.

b) the variety of species — The textbook states: CHAPTER Species Diversity This refers to the variety of species.

a) in a defined area — The textbook states: It relates to the number of species in a defined area.

d) richness, abundance and types — The textbook states: The diversity of species can be measured through its richness, abundance and types.

c) in the earlier chapter — The textbook states: Ecosystem Diversity You have studied about the ecosystem in the earlier chapter.

b) constitute the ecosystem diversity — The textbook states: The broad differences between ecosystem types and the diversity of habitats and ecological processes occurring within each ecosystem type constitute the ecosystem diversity.

a) not very rigidly defined — The textbook states: The ‘boundaries’ of communities (associations of species) and ecosystems are not very rigidly defined.

d) difficult and complex — The textbook states: Thus, the demarcation of ecosystem boundaries is difficult and complex.

c) useful to other organisms — The textbook states: That means, every organism, besides extracting its needs, also contributes something of useful to other organisms.

b) the sustenance of ecosystems — The textbook states: Can you think of the way we, humans contribute to the sustenance of ecosystems.

a) help regulate the climate — The textbook states: Species capture and store energy, produce and decompose organic materials, help to cycle water and nutrients throughout the ecosystem, fix atmospheric gases and help regulate the climate.

d) important for ecosystem function and human su — The textbook states: These functions are important for ecosystem function and human survival.

c) the chances for the species to survive throug — The textbook states: The more diverse an ecosystem, better are the chances for the species to survive through adversities and attacks, and consequently, is more productive.

b) system to maintain itself — The textbook states: Hence, the loss of species would decrease the ability of the system to maintain itself.

a) adapting to environmental change — The textbook states: Just like a species with a high genetic diversity, an ecosystem with high biodiversity may have a greater chance of adapting to environmental change.

d) Biodiversity For — The textbook states: Economic Role of Biodiversity For all humans, biodiversity is an important resource in their day-to-day life.

c) ‘crop diversity’ — The textbook states: One important part of biodiversity is ‘crop diversity’, which is also called agro-biodiversity.

b) seen as a reservoir of resources to be drawn — The textbook states: Biodiversity is seen as a reservoir of resources to be drawn upon for the manufacture of food, pharmaceutical, and cosmetic products.

a) responsible for the deterioration of biodiver — The textbook states: This concept of biological resources is responsible for the deterioration of biodiversity.

d) also the origin of new conflicts dealing with — The textbook states: At the same time, it is also the origin of new conflicts dealing with rules of division and appropriation of natural resources.

c) fish, medicinal resources, etc — The textbook states: Some of the important economic commodities that biodiversity supplies to humankind are: food crops, livestock, forests, fish, medicinal resources, etc.

b) Biodiversity Biodiversity — The textbook states: Scientific Role of Biodiversity Biodiversity is important because each species can give us some clue as to how life evolved and will continue to evolve.

a) Importance — The textbook states: Biodiversity also helps in understanding how life functions and the role of each species in su staining Importance of Biodiversity Biodiversity has contributed in many ways to the development of human culture and, in turn, human communities have played a major role in shaping the diversity of nature at the genetic, species and ecological levels.

d) ecological, economic and scientific — The textbook states: Biodiversity plays the following roles: ecological, economic and scientific.

You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water. No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity.

You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. Biodiversity can be discussed at three levels : (i) Genetic diversity; (ii) Species diversity; (iii) Ecosystem diversity. Biodiversity also helps in understanding how life functions and the role of each species in su staining Importance of Biodiversity Biodiversity has contributed in many ways to the development of human culture and, in turn, human communities have played a major role in shaping the diversity of nature at the genetic, species and ecological levels.

You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. Ecosystem Diversity You have studied about the ecosystem in the earlier chapter. Can you think of the way we, humans contribute to the sustenance of ecosystems.

It refers to the varieties of plants, animals and micro-organisms, the genes they contain and the ecosystems they form. Biodiversity also helps in understanding how life functions and the role of each species in su staining Importance of Biodiversity Biodiversity has contributed in many ways to the development of human culture and, in turn, human communities have played a major role in shaping the diversity of nature at the genetic, species and ecological levels. If species of plants and animals become endangered, they cause degradation in the environment, which may threaten human being’s own existence.

You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. Species which are not the natural inhabitants of the local habitat but are introduced into the system, are called exotic species . There are many examples when a natural biotic community of the ecosystem suffered extensive damage because of the introduction of exotic species.

You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity.

The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water.

No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity.

Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution.

Before the advent of humans, our earth supported more biodiversity than in any other period.

Since, the emergence of humans, however, biodiversity has begun a rapid decline, with one species after another bearing the brunt of extinction due to overuse.

The number of species globally vary from 2 million to 100 million, with 10 million being the best estimate.

New species are regularly discovered most of which are yet to be classified (an estimate states that about 40 per cent of fresh water fishes from South America are not classified yet).

Tropical forests are very rich in bio-diversity.

Biodiversity is a system in constant evolution, from a view point of species, as well as from view point of an individual organism.

The average half-life of a species is estimated at between one and four million years, and 99 per cent of the species that have ever lived on the earth are today extinct.

Biodiversity is not found evenly on the earth.

As one approaches the polar regions, one finds larger and larger populations of fewer and fewer species.

Biodiversity itself is a combination of two words, Bio (life) and diversity (variety).

In simple terms, biodiversity is the number and variety of organisms found within a specified geographic region.

It refers to the varieties of plants, animals and micro-organisms, the genes they contain and the ecosystems they form.

It relates to the variability among living organisms on the earth, including the variability within and between the species and that within and between the ecosystems.

It is a result of hundreds of millions of years of evolutionary history.

Biodiversity can be discussed at three levels : (i) Genetic diversity; (ii) Species diversity; (iii) Ecosystem diversity.

Genetic Diversity Genes are the basic building blocks of various life forms.

You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water. No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity. Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution. Before the advent of humans, our earth supported more biodiversity than in any other period. Biodiversity also helps in understanding how life functions and the role of each species in su staining Importance of Biodiversity Biodiversity has contributed in many ways to the development of human culture and, in turn, human communities have played a major role in shaping the diversity of nature at the genetic, species and ecological levels. Biodiversity plays the following roles: ecological, economic and scientific.

You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water. No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity. This concept of biological resources is responsible for the deterioration of biodiversity. Biodiversity also helps in understanding how life functions and the role of each species in su staining Importance of Biodiversity Biodiversity has contributed in many ways to the development of human culture and, in turn, human communities have played a major role in shaping the diversity of nature at the genetic, species and ecological levels. LOSS OF BIODIVERSITY Since the last few decades, growth in human population has increased the rate of consumption of natural resources. The world conservation strategy has suggested the following steps for biodiversity conservation: (i) Efforts should be made to pr eserve the species that are endangered.

You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water. No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity.

The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water. You should know that this weathering mantle is the basis for the diversity of vegetation and hence, the biodiversity. The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water. No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity. Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution.

No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity. The basic cause for such weathering variations and resultant biodiversity is the input of solar energy and water. No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity. Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution. Before the advent of humans, our earth supported more biodiversity than in any other period.

Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution. No wonder that the areas that are rich in these inputs are the areas of wide spectrum of biodiversity. Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution. Before the advent of humans, our earth supported more biodiversity than in any other period. Since, the emergence of humans, however, biodiversity has begun a rapid decline, with one species after another bearing the brunt of extinction due to overuse.

Before the advent of humans, our earth supported more biodiversity than in any other period. Biodiversity as we have today is the result of 2.5-3.5 billion years of evolution. Before the advent of humans, our earth supported more biodiversity than in any other period. Since, the emergence of humans, however, biodiversity has begun a rapid decline, with one species after another bearing the brunt of extinction due to overuse. The number of species globally vary from 2 million to 100 million, with 10 million being the best estimate.