Tag: environmental conservation and biodiversity
Questions Related to environmental conservation and biodiversity
Which of the following ecosystems exhibits maximum genetic variations?
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Tropical rain forests
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Tropical evergreen forests
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Coniferous forests
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Temperate forests
Species diversity or genetic variation increases as one proceeds from high altitude to low altitude and high latitude to low latitude. Tropical rain forests are wet and dense. They exhibit maximum genetic variations due to increased temperature and rainfall. They show high animal and plants biodiversity.
Which of the following helps in maintaining species diversity in a community?
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Omnivores
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Predators
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Herbivores
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Facultative parasites
Species diversity is defined as the number of different species in a given community. The species diversity in a community is maintained by predators. Predators are organisms that feed on prey. They can increase, decrease or leave unchanged species diversity. They increase species diversity by preying on competitive dominant species and reduce species diversity by reducing consumer pressure on foundation species.
Let no one species encroach over the right and privileges of other species is the stanza from
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Atharva Veda
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Isha Upanishad
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Kautilyas Arthashastra
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Bhagvat Geeta
Isha Upanishad is one of shortest Upanishads, which is embedded as the final chapters of Shukla Yajurveda, the following stanza is found in this upanishad.
Species diversity increases as one proceeds from
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High altitude to low altitude and high latitude to low latitude
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Low altitude to high altitude and high latitude to low latitude
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Low altitude to high altitude and low latitude to high latitude
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High altitude to low altitude and low latitude to high latitude
- Species diversity increases as one proceeds from high altitude to low altitude and high latitude to low latitude. The temperature and seasonal variability increases with increased altitude and decreased latitude. Hence, this results in higher species diversity in these areas.
Gymnosperm species known from India is
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119
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209
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64
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48
Gymnosperms mean naked seeds; their ovules are naked and freely exposed to pollination, and the fertilized seeds are not enclosed by carpels. Great biodiversity exists on our planet. Millions of living plants and animal species are flourishing on Earth. An approximate of 1.7 million organisms are known to exist. 64 gymnosperm species are known from India.
A species spread over a large tract with varied environmental conditions will have
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Higher genetic diversity
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Uniform gene pool
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Little genetic diversity
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Either B or C
The variety and variability of living organisms (both plants and animals) are known as biodiversity. The variation measured by biodiversity is at the genetic, species, and ecosystem level. Gene-based diversity is known as genetic diversity. It is a way for populations to adapt to changing environments. A species spread over a large tract with varied environmental conditions will have higher genetic diversity.
In India, we find mangoes with different flavours, colours, fibre content, sugar content and shelf life. The large variation is due to
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Genetic diversity
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Species diversity
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Induced mutations
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Hybridisation
Beta diversity is diversity
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In a community
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Between communities
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In mountain gradient
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On a plain
Beta diversity is the diversity present between the communities. It is also the rate of replacement of species along a gradient of habitats/communities. Whereas, the local species pool is known as alpha diversity and the diversity present in the ranges of communities is known as Gamma diversity.
The relation between species richness and area is correctly depicted by
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log S = log C - Z log A
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log S = Z log A
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log S = log C + Z log A
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log S = log C
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log C = log S + Z log A
The relationship between the area of a habitat, or of part of a habitat, and the number of species found within that area is described by the species-area curve. It says that log S = log C + Z log A. Here S is the number of species, A is the habitat area, and Z is the slope of the species-area relationship. Larger areas tend to contain larger numbers of species.
So, the correct answer is 'log S = log C + Z log A'.
Which scientist proposed alphaα types species diversity?
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Bentham and Huxley
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Linnaeus
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Whittaker
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Eichler
The local species pool is known as alpha diversity. It is also the diversity present within the community. The term was introduced by R. H. Whittaker. Example of such diversity includes high tree diversity throughout the Amazon Rainforests of Ecuador. Generally, gamma diversity = alpha diversity x beta diversity.