12th Grade > Biology
BIODIVERSITY AND CONSERVATION MCQs
Total Questions : 54
| Page 3 of 6 pages
Answer: Option A. -> Number of species in a given area
:
A
Species richness is defined as the number of species in a given area. It does not take into account the relative abundance or distribution of the species. The total number of species on earth denotes the biodiversity of the planet and the number of individuals in a population per unit area is the population density.
:
A
Species richness is defined as the number of species in a given area. It does not take into account the relative abundance or distribution of the species. The total number of species on earth denotes the biodiversity of the planet and the number of individuals in a population per unit area is the population density.
Answer: Option C. -> Sunlight is the primary source of energy from which all biomass is created on Earth
:
C
Sunlight is the primary source of energy for all life forms on earth. Since the tropical region is exposed to more sunlight than any other region, the area receives an abundance of solar energy, which promotes the growth of plants. As the flora of a region expands in number, the fauna also expands, as an abundance of vegetation apparently, makes it a favourable habitat to live in.
:
C
Sunlight is the primary source of energy for all life forms on earth. Since the tropical region is exposed to more sunlight than any other region, the area receives an abundance of solar energy, which promotes the growth of plants. As the flora of a region expands in number, the fauna also expands, as an abundance of vegetation apparently, makes it a favourable habitat to live in.
Answer: Option A. -> Rice
:
A
There are an estimated 200,000 varieties of rice in India alone. The diversity of rice in India is among the richest in the world. Basmati rice has 27 documented varieties grown in India.
:
A
There are an estimated 200,000 varieties of rice in India alone. The diversity of rice in India is among the richest in the world. Basmati rice has 27 documented varieties grown in India.
Answer: Option A. -> 448
:
A
India currently has 448 Wildlife Sanctuaries. In addition, there are 90 National Parks and 14 Biosphere Reserves in India.
:
A
India currently has 448 Wildlife Sanctuaries. In addition, there are 90 National Parks and 14 Biosphere Reserves in India.
Answer: Option C. -> They allow ex situ conservation of germplasm
:
C
A Botanical Garden serves as a repository of different species of plants. These gardens help in the preservation of species that face the threat of extinction. Some Botanical Gardens also have cryopreservation facilities wherein the seeds of certain species are stored for future use.
:
C
A Botanical Garden serves as a repository of different species of plants. These gardens help in the preservation of species that face the threat of extinction. Some Botanical Gardens also have cryopreservation facilities wherein the seeds of certain species are stored for future use.
Answer: Option D. -> Any of these
:
D
The IUCN (International Union for Conservation of Nature and Natural resources) maintainsa Red List, which contains a record of species, which have been categorised into nine groups based on how close they are to extinction.These include extinct, extinct in the wild, critically endangered, endangered, vulnerable, near threatened, least concern, data deficient and not evaluated. As the number of individuals of a particular species reduces, the closer the species would move towards the category of extinction.
:
D
The IUCN (International Union for Conservation of Nature and Natural resources) maintainsa Red List, which contains a record of species, which have been categorised into nine groups based on how close they are to extinction.These include extinct, extinct in the wild, critically endangered, endangered, vulnerable, near threatened, least concern, data deficient and not evaluated. As the number of individuals of a particular species reduces, the closer the species would move towards the category of extinction.
Answer: Option D. -> All of these
:
D
Human interference has resulted in severe damage to the environment. Developmental activities have destroyed several large natural ecosystems. Along with these, agriculture is another major reason for the loss of ecosystems, since humans tend to use more land for cultivating crops.
:
D
Human interference has resulted in severe damage to the environment. Developmental activities have destroyed several large natural ecosystems. Along with these, agriculture is another major reason for the loss of ecosystems, since humans tend to use more land for cultivating crops.
Answer: Option C. -> Insects
:
C
We have currently identified and classified about 1.5 million eukaryotic species. Of the species identified so far, about 950,000 species of them are insects. Therefore insects form the most diverse taxa, close to 60% of all species. Only eukaryotic species are accounted for in biodiversity, because species boundaries are ill-defined in prokaryotes. Therefore viruses have not been accounted for here. There are about 350,000 beetles that have been identified so far, that is close to 40% of all species. Since close to 60% of the pie-chart has been indicated here under this group, the missing taxon here is insects.
:
C
We have currently identified and classified about 1.5 million eukaryotic species. Of the species identified so far, about 950,000 species of them are insects. Therefore insects form the most diverse taxa, close to 60% of all species. Only eukaryotic species are accounted for in biodiversity, because species boundaries are ill-defined in prokaryotes. Therefore viruses have not been accounted for here. There are about 350,000 beetles that have been identified so far, that is close to 40% of all species. Since close to 60% of the pie-chart has been indicated here under this group, the missing taxon here is insects.
Answer: Option D. -> All of these
:
D
All these are exotic species. Anexotic speciesis one that historically lives in a particularplace, but has been moved to a new geographic location due to human interference. These exotic species can turn invasive and wreakhavoc as water hyacinth (Eichhornia)did, by dryingup our rivers. Partheniumis also a weed thatmade our soils infertile. Lantana is a weed that has spread around in a lot of places..
:
D
All these are exotic species. Anexotic speciesis one that historically lives in a particularplace, but has been moved to a new geographic location due to human interference. These exotic species can turn invasive and wreakhavoc as water hyacinth (Eichhornia)did, by dryingup our rivers. Partheniumis also a weed thatmade our soils infertile. Lantana is a weed that has spread around in a lot of places..
Answer: Option D. -> All of the above
:
D
There are three major reasons for the conservation of species and biodiversity in general. The narrowly utilitarian arguments suggest that biodiversity needs to be conserved due to the strong correlation between biodiversity and benefit to humans. Thus, we generally tend to conserve only those aspects of the ecosystem that directly benefit us. This includes, for instance, the conservation of crops such as cereals and those of medicinal value, that can directly benefit humans. The broadly utilitarian arguments however, take into consideration all the aspects that work together in the ecosystem to maintain ecological balance. It explains the philosophy that biodiversity must be conserved even if we cannot receive any direct economic benefits. A simple example is the protection of animal species that aid in pollination. The ethical argument for the conservation of biodiversity is that it is our moral responsibility to give back to the millions of species we co-exist with, on this planet. Moreover, it is also true that man cannot recreate a lost species. Thus, it is important that all species are protected.
:
D
There are three major reasons for the conservation of species and biodiversity in general. The narrowly utilitarian arguments suggest that biodiversity needs to be conserved due to the strong correlation between biodiversity and benefit to humans. Thus, we generally tend to conserve only those aspects of the ecosystem that directly benefit us. This includes, for instance, the conservation of crops such as cereals and those of medicinal value, that can directly benefit humans. The broadly utilitarian arguments however, take into consideration all the aspects that work together in the ecosystem to maintain ecological balance. It explains the philosophy that biodiversity must be conserved even if we cannot receive any direct economic benefits. A simple example is the protection of animal species that aid in pollination. The ethical argument for the conservation of biodiversity is that it is our moral responsibility to give back to the millions of species we co-exist with, on this planet. Moreover, it is also true that man cannot recreate a lost species. Thus, it is important that all species are protected.
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