12th Grade > Biology
BIODIVERSITY AND CONSERVATION MCQs
Total Questions : 54
| Page 2 of 6 pages
Answer: Option C. -> Human activities are totally banned
:
C
The core area of a National Park or Tiger Reserve is cut off from any sort of human contact. These places are part of the dense forest, and human intervention could lead to unwanted confrontation between man and animal.
:
C
The core area of a National Park or Tiger Reserve is cut off from any sort of human contact. These places are part of the dense forest, and human intervention could lead to unwanted confrontation between man and animal.
Answer: Option B. -> Over-exploitation of passenger pigeons for meat, sport and feather
:
B
Passenger pigeons were found in over billions of numbers in the United States. In just fifty years, the passenger pigeons drastically reduced in number from over billions to zero.These birdswere hunted relentlessly for meat, sport and feathers to satisfy human greed.
:
B
Passenger pigeons were found in over billions of numbers in the United States. In just fifty years, the passenger pigeons drastically reduced in number from over billions to zero.These birdswere hunted relentlessly for meat, sport and feathers to satisfy human greed.
Answer: Option A. -> Lake Victoria
:
A
Cichlid species became extinct from Lake Victoria because of invasion by the predatory fish Nile perch. The Nile perch was an alien species that was introduced into the lake to improve fishing. However, this resulted in the extinction of the native cichlid fish. Cichlids were detritivores and hence, their extinction caused deterioration of the lake.
:
A
Cichlid species became extinct from Lake Victoria because of invasion by the predatory fish Nile perch. The Nile perch was an alien species that was introduced into the lake to improve fishing. However, this resulted in the extinction of the native cichlid fish. Cichlids were detritivores and hence, their extinction caused deterioration of the lake.
Answer: Option A. -> Log S = Log C + Z Log A
:
A
Species-Area relationship deals with species richness and explored area. Species richness is directly proportional to the area that is explored by species. Mathematically it is represented as Log S = Log C + Z Log A.
:
A
Species-Area relationship deals with species richness and explored area. Species richness is directly proportional to the area that is explored by species. Mathematically it is represented as Log S = Log C + Z Log A.
Answer: Option D. -> Both B and C
:
D
Species richness and species evenness are two important factors that decide how diverse the particular ecosystem is.Species richnessis the number of differentspeciesrepresented in an ecological community, landscape or region.Species evenness is how evenly spread the population is across the species in an area.
:
D
Species richness and species evenness are two important factors that decide how diverse the particular ecosystem is.Species richnessis the number of differentspeciesrepresented in an ecological community, landscape or region.Species evenness is how evenly spread the population is across the species in an area.
Answer: Option C. -> Speciation is a function of time and area
:
C
Biodiversity exhibits a latitudinal gradient - it is greatest near the equator, and decreases as you move away from the equator towards the poles. The reason why we see such a pattern has been explained through many hypotheses, one of it being that, speciation is a function of time and area. The tropics covering a vast area, have given rise to a lot more species than the temperates or the Arctic Tundra. Further, the tropics have been relatively unaffected by natural disasters, while the other regions on the planet have been subjected to many glaciations and therefore, the tropics have developed a lot more species over time. Rainforests are in fact, the oldest biome on the planet and therefore, have the greatest biodiversity.
:
C
Biodiversity exhibits a latitudinal gradient - it is greatest near the equator, and decreases as you move away from the equator towards the poles. The reason why we see such a pattern has been explained through many hypotheses, one of it being that, speciation is a function of time and area. The tropics covering a vast area, have given rise to a lot more species than the temperates or the Arctic Tundra. Further, the tropics have been relatively unaffected by natural disasters, while the other regions on the planet have been subjected to many glaciations and therefore, the tropics have developed a lot more species over time. Rainforests are in fact, the oldest biome on the planet and therefore, have the greatest biodiversity.
Answer: Option A. -> A species from an ecosystem gets introduced into another ecosystem
:
A
Sometimes due to human intervention, a species from a different ecosystem is introduced into an already established and flourishing ecosystem. These alien species tend to grow in size unchecked, since they do not become part of the food chain. This can have catastrophic effects on the ecosystem and can even destroy the biological diversity. This phenomenon is called alien species invasion.
:
A
Sometimes due to human intervention, a species from a different ecosystem is introduced into an already established and flourishing ecosystem. These alien species tend to grow in size unchecked, since they do not become part of the food chain. This can have catastrophic effects on the ecosystem and can even destroy the biological diversity. This phenomenon is called alien species invasion.
Answer: Option C. -> Both A and B
:
C
Wildlife is conserved by both in situ and ex situ methods.
In situ or on-siteconservationinvolves theconservationof genetic resources of natural populations of plant and animal species, such as from forests, National Parks and Biosphere Reserves.
Ex situconservation involves the preservation of components of biological diversity outside their natural habitats, such as in Zoological Parks.
:
C
Wildlife is conserved by both in situ and ex situ methods.
In situ or on-siteconservationinvolves theconservationof genetic resources of natural populations of plant and animal species, such as from forests, National Parks and Biosphere Reserves.
Ex situconservation involves the preservation of components of biological diversity outside their natural habitats, such as in Zoological Parks.
Answer: Option A. -> True
:
A
The presence of a large number of trees as well as tall and wide trees that make up the canopy of the rainforest results in a larger amount of soil that is in contact with the large roots of evergreen trees. This makes it difficult for such large trees to be easily uprooted. Conversely, cacti in the deserts have long roots that facilitate better access to water but they are not as strongly anchored to the desert sand.
:
A
The presence of a large number of trees as well as tall and wide trees that make up the canopy of the rainforest results in a larger amount of soil that is in contact with the large roots of evergreen trees. This makes it difficult for such large trees to be easily uprooted. Conversely, cacti in the deserts have long roots that facilitate better access to water but they are not as strongly anchored to the desert sand.
Answer: Option B. -> 80% of the species known today are animals
:
B
Of the total number of species that have been catalogued so far, approximately 80% belong to the Animal Kingdom and the remaining, to the Plant Kingdom. New species get added to this list every year, and till date, most of them have been found to belong to the Animal Kingdom.
:
B
Of the total number of species that have been catalogued so far, approximately 80% belong to the Animal Kingdom and the remaining, to the Plant Kingdom. New species get added to this list every year, and till date, most of them have been found to belong to the Animal Kingdom.
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