Tag: biodiversity on earth and in india

Questions Related to biodiversity on earth and in india

Which evolutionary force decreases the genetic diversity of a population by increasing the proportion of smaller individuals?

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Mutation

  2. Gene flow

  3. Bottle neck effect

  4. Random mating

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Correct Option: C

Quinine is obtained from

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Leaves of Cinchona

  2. Roots of Cinchona

  3. Bark of Cinchona

  4. Seeds of Cinchona

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Correct Option: C
Explanation:

Quinine occurs naturally in the bark of the Cinchona tree, though it has also been synthesized in the laboratory. The medicinal properties of the Cinchona tree were originally discovered by the Quechua, who are indigenous to Peru and Bolivia, later the Jesuits were the first to bring Cinchona to Europe.

Thus, the correct option is C.

Tendency of increase of species diversity in transition zone between two community is called as

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Ecotone effect

  2. Edge effect

  3. Border effect

  4. Complementary effect

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Correct Option: B
Explanation:

In ecology, edge effects refer to the changes in population or community structures, that occur at the boundary of two habitats. Areas with small habitat fragments exhibit especially pronounced edge effects that may extend throughout the range. As the edge effects increase, the boundary habitat allows for greater biodiversity.

A tiger will think twice before attacking this animal, even though it is alone. Which is it ?

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Nilgai

  2. Wild dog

  3. Wild buffalo

  4. Chital

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Correct Option: C
Explanation:

The tiger (Panthera tigris) is the largest cat species, reaching a total body length of up to 3.38 m (11.1 ft) over curves and weighing up to 388.7 kg (857 lb) in the wild. Its most recognizable feature is a pattern of dark vertical stripes on reddish-orange fur with a lighter underside. The species is classified in the genus Panthera with the lion, leopard, jaguar and snow leopard. Tigers are apex predators, primarily preying on ungulates such as deer and bovids.  The wild  buffalo (Bubalus arnee), also called Asian buffalo and Asiatic buffalo, is a large bovine native to the Indian Subcontinent and Southeast Asia.
Tigers will be mostly killed by wild buffaloes, when they both fight. So, a tiger will have to think twice before attacking wild buffalo.

Genetic diversity will be more common in organisms with 

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Parthenogenesis

  2. Sexual reproduction

  3. Asexual reproduction

  4. Parthenocarpy

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Correct Option: B
Explanation:

Genetic diversity refers to the variety of genes within a species. Each species is made up of individuals, that have their own particular genetic composition. Within a species there may also be discrete populations with distinctive genes. 

Asexual reproduction results in no new gene configurations, so the offspring is genetically identical to the parent. 
Sexual reproduction results in an offspring, that receives genes from two parents. The advantage of sexual reproduction occurs when the two parents come from different populations. This way the genetic info is the combination of two parents from two separate populations. This is why young male lions are kicked out of the pride and why it is illegal to marry your cousin, as this insures genetic diversity.

The conservation of local (endemic) varieties of crops is must because

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. These are source of genes for genetic diversity.

  2. These are high yielding and nutritious.

  3. We want to conserve all plants and animals of the past for our knowledge.

  4. All of the above.

Show answer
Correct Option: A
Explanation:

Genetic diversity refers to the variety of genes within a species. Each species is made up of individuals that have their own particular genetic composition. Within a species there may also be discrete populations with distinctive genes. Sexual reproduction is critical for maintaining genetic diversity within a species, because it combines the parents genetic material, resulting in offspring with unique genetic blue prints different from either parent. 

The conservation of local varieties are important, as they provide genes for genetic diversity.

Greatest genetic diversity of crop plant is found in

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Central America

  2. Homelands

  3. South America

  4. India

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Correct Option: B
Explanation:

Diversity in crops is showcased as genetic and phenotypic characters. These include variety of  the size of seeds, branching pattern, height differences, flower color, fruiting time and flavor. Genetic diversity is the total number of genetic characteristics that make up the species and play a major role in modern plant breeding and the greatest diversity in crop plants is seen in the homelands.

Species diversity in an ecosystem mainly depends on

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Light intensity

  2. Less temperature

  3. Rain fall

  4. Soil type

Show answer
Correct Option: C
Explanation:

Species diversity is a measure of the diversity within an ecological community that incorporates both species richness (the number of species in a community) and the evenness of species abundances and it varies from region to region and mainly depends on rainfall apart from other other factors like temperature, light intensity etc. 

Therefore, the correct answer is option C.

Which one of the following shows maximum genetic diversity in India?

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. Groundnut

  2. Rice

  3. Maize

  4. Mango

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Correct Option: B
Explanation:

Rice has more than 50,000 genetically different strains, while mango has 1000 varieties in India. 

Therefore, the correct answer is option B.

Four species of birds have different egg colours: [1] white with no markings, [2] pale brown with no markings, [3] grey-brown with dark streaks and spots, [4] pale blue with dark blue-green spots. Based on egg colour, which species is most likely to nest in a deep tree hole?

zoology biodiversity, classification and conservation levels of biodiversity environmental conservation and biodiversity biodiversity on earth and in india

  1. 1

  2. 2

  3. 3

  4. 4

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Correct Option: A
Explanation:

White birds with no markings would likely to nest in a deep tree hole as they can't camouflage with the surroundings and can easily be prey for its predators. Others can hide themselves under the color of trees. 

Therefore, the correct answer is option A.