Tag: basis of classification in animals

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Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

The loss of the sum total and variety of all the genes and their alleles present in a population or species is called as

  1. Genetic conservation

  2. Genetic erosion

  3. Species extinction

  4. Gene pooling
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Genetic erosion is a process whereby an already limited gene pool of an endangered species of plant or animal diminishes even more, when individuals from the surviving population die off without getting a chance to meet and breed with others in their endangered low population. 

The term is sometimes used in a narrow sense, such as when describing the loss of particular alleles or genes, as well as being used more broadly, as when referring to the loss of varieties or even whole species.
Genetic erosion occurs because each individual organism has many unique genes, which get lost when it dies without getting a chance to breed. 

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

Germplasm is

  1. Obsolete and improved genetic material

  2. Genetic material of related wild type

  3. Both a and b

  4. Improved genetic material
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Germplasm is a term used to describe living genetic resources, such as seeds or tissue, maintained for the purpose of breeding, preservation, and other research uses. These resources may take the form of seed collections stored in seed banks, trees growing in nurseries, animal breeding lines maintained in animal breeding programs or gene banks, etc. Germplasm collections can range from collections of wild species to elite, domesticated breeding lines that have undergone extensive human selection.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

Greatest genetic diversity is found in areas where 

  1. Plants grow wild

  2. Crops are cultivated

  3. Species originated

  4. Production is the highest
Reveal answer Fill a bubble to check yourself
C 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. Speciation is the evolutionary process by which new biological species arise. The biologist Orator F. Cook was the first to coin the term 'speciation' for the splitting of lineages or "cladogenesis," as opposed to "anagenesis" or "phyletic evolution" occurring within lineages.
More diversity will be introduced to gene pool when speciation occurs; as a result of which more and more species will be produced.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

The species used as natural genetic engineer is

  1. Agrobacterium tumefaciens

  2. Bacillus thuringiensis

  3. Aspergillus

  4. Drosophila
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Agrobacterium tumefaciens will transfer genes (T-DNA region of Ti plasmid) into the plant that produces its food or nutrient called opines (opines are not needed for plants). Apart from that, it also integrates genes for cell division and proliferation leading to crown gall disease, so that more number of cells result in more production of opines. Because of this reason it is called as a 'natural genetic engineer'.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

The three top most major crops of the world in terms of major staple food are?

  1. Maize > Rice >Wheat

  2. Rice > Wheat > Maize

  3. Wheat > Maize > Rice

  4. Rice > Maize >Wheat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A staple food, sometimes simply referred to as a staple, is a food that is eaten routinely, and in such quantities that it constitutes a dominant portion of a standard diet in a given population, supplying a large fraction of the needs for energy-rich materials and generally a significant proportion of the intake of other nutrients as well. Most people live on a diet based on just a small number of staples.
Staple foods vary from place to place, but typically they are inexpensive or readily available foods that supply one or more of the three organic macronutrients needed for survival and health: carbohydrates, proteins, and fats.
Wheat (Triticum spp.) is a cereal grain, originally from the levant region of the Near East but now cultivated worldwide. In 2013, world production of wheat was 713 million tons, making it the third most-produced cereal after maize (1,016 million tons) and rice (745 million tons). 

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

Which one will be searched for obtaining maximum genetic diversity?

  1. Recent varieties

  2. Old varieties

  3. Wild relatives

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genetic diversity refers to the total number of genetic characteristics in the genetic makeup of the species. Genetic diversity serves as a way for populations to adapt to changing environments.
In order to capture the maximum genetic diversity of a species, recent, old, wild - all kind of varieties will be considered and taken into account and searched.
Thus, the correct answer is option (D),  'All of the above'.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

The genome of an extinct species can be preserved in

  1. Gene Bank

  2. National park

  3. Herbarium

  4. None of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Extinction of a particular animal or plant species occurs when there are no more individuals of that species alive anywhere in the world - the species has died out. When it does not exist at all , preserving it also not possible.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

Genetic erosion is due to

  1. Deforestation

  2. Shifting cultivation

  3. Adoption of genetically uniform varieties

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Genetic erosion is a process whereby an already limited gene pool of an endangered species of plant or animal diminishes even more when individuals from the surviving population die off without getting a chance to meet and breed with others in their endangered low population. Low genetic diversity in a population of wild animals and plants leads to a further diminishing gene pool, inbreeding and a weakening immune system and fast tracks that species towards eventual extinction. 

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

Wild varieties of plants must be conserved to

  1. Destroy ecosystem

  2. Feeding wild animals

  3. Future evolution

  4. Incorporate useful traits in future crop varieties
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Wild varieties of plants must be conserved because they are of utmost value to plant breeders for producing improved and favourable varieties of plants by selecting useful genes from a wide range of their wild relatives. In other words, new and improved varieties of crops are derived from their wild relatives by genetic modification. Useful traits are like high yielding, disease resistant, stress resistant etc.

Multiple choice zoology biodiversity and conservation hotspots and methods of conservation biodiversity: conservation conservation of biodiversity basis of classification in animals basis of the classification of animals criteria for animal classification

Germplasm is present in

  1. Somatic cells

  2. Growing points

  3. Reproductive cells

  4. Both (a) and (c)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Germplasm is a living tissue from which new plants can be grown. It can be a seed or another plant part like a leaf, a piece of stem, pollen or even just a few cells that can be turned into a whole plant. Germplasm contains the information for a species genetic makeup, a valuable natural resource of plant diversity.