Tag: levels of biodiversity

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

India is among $12$ megadiversity countries of world, due its percentage contribution in global species diversity, that is:-

  1. $1.8 \%$
  2. $2.4 \%$
  3. $8.1 \%$
  4. $4.2 \%$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Megadiversity refers to the diversity in various life forms. India is one of the megadiverse countries where diversity of global species is found. There are 4 biodiversity hotspots (the area where large species diversity is present) in India, they are:

  1. Himalaya
  2. Indo-Burma
  3. Sundaland
  4. The Western Ghats and Sri Lanka
In India, the total area under biodiversity hotspot is about 2.4 % and its contribution to global species diversity is about 7 - 8.5 %.
So, the correct option is '8.1%'.

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

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

  1. Mutation

  2. Gene flow

  3. Bottle neck effect

  4. Random mating
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The bottleneck effect occurs when a population's size is drastically reduced, leading to loss of genetic diversity as only certain individuals survive and reproduce. This reduces the gene pool. Mutation increases diversity, gene flow can increase diversity by introducing new alleles, and random mating maintains Hardy-Weinberg equilibrium.

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

Quinine is obtained from

  1. Leaves of Cinchona

  2. Roots of Cinchona

  3. Bark of Cinchona

  4. Seeds of Cinchona
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

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

  1. Ecotone effect

  2. Edge effect

  3. Border effect

  4. Complementary effect
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Nilgai

  2. Wild dog

  3. Wild buffalo

  4. Chital
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Genetic diversity will be more common in organisms with 

  1. Parthenogenesis

  2. Sexual reproduction

  3. Asexual reproduction

  4. Parthenocarpy
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Greatest genetic diversity of crop plant is found in

  1. Central America

  2. Homelands

  3. South America

  4. India
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Species diversity in an ecosystem mainly depends on

  1. Light intensity

  2. Less temperature

  3. Rain fall

  4. Soil type
Reveal answer Fill a bubble to check yourself
C Correct answer
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.