Biodiversity and Conservation Test

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Biodiversity and Conservation Test - 72

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Weekly Quiz Competition

Question 1
1 / -0

An orthodox seed is one which can

A
Tolerate dehydration and low temperature.

B
Tolerate low temperature but not dehydration.

C
Tolerate dehydration but not low temperature.

D
None of the above.

Solution

Orthodox seeds are those that can survive in either drying or freezing condition. Such seed dried to moisture contents of 10% or less and then stored successfully at subfreezing temperatures (-10$$^0$$ C).
Question 2
1 / -0

Vavilov collected............. varieties of Wheat

A
26,000

B
2,600

C
4,600

D
260

Solution

Vavilov collected not less than 26,000 varieties of wheat alone, were kept in cultivation at Leningrad. These collections formed the basis for new theories on the origin of cultivated plants and laid the foundation for the future improvement of crop plants and of one of the largest and oldest seed banks in the world today.
Question 3
1 / -0

In a gene bank, genetic material is stored as

A
Genes

B
Seeds

C
Callus

D
Both B and C

Solution

Gene banks is the mean of storing plant genetic material. This ex-situ system is based on three methods of storing the material: seed banks provide a controlled environment where seeds can be dried to low moisture content and stored at low temperature without losing their viability. Field gene banks such as arboreta, plantations, and botanical gardens are used for species that are difficult or impossible to store as seed, including many perennials, vegetatively propagated crops and tree species. In vitro methods which conserve plant parts, tissue or cells in a nutrient medium can be used to conserve species that do not readily produce seeds, or where the seeds cannot be dried without damaging them.
Question 4
1 / -0

The concept of "Centres of Origin of Cultivated Plants" was put forward by

A
Swaminathan

B
Mendel

C
Vavilov

D
Borlaug

Solution

Vavilov worked on global genetic diversity of cultivated plants throughout his life, from which he developed several major theories that have played an important role in the development of botany, genetics and plant breeding. One such theory among several is "Theory of centres of origin of cultivated plants" (1920).
Question 5
1 / -0

If at high altitudes, birds become rare, the plants likely to disappear are

A
Pine

B
Orchids

C
Oak

D
Rhododendrons

Solution

Rhododendron is mostly distributed at higher elevations in the Sino-Himalayan region with maximum concentration in Western China. In India, the species are mostly confined to the Himalayan region, particularly in eastern Himalaya. The maximum numbers of Rhododendron are present in the 3001-3500 m altitudes and absent in less than 500 m. Rhododendrons possess large red tubular-campanulate flowers that produce copious amounts of nectar and is pollinated by birds. So, in the absence of birds, they can not pollinate and will be disappeared.
Question 6
1 / -0

The species diversity of plants on Earth will be

A
2.4%

B
22%

C
8.1%

D
85%

E
70%

Solution

Species diversity is the number of different species, that are represented in a given community.
Species diversity consists of two components: species richness and species evenness. Species richness is a simple count of species, whereas species evenness quantifies how equal the abundances of the species are. More than 70% of species recorded are animals and 22% are plant species.
Question 7
1 / -0

A set of bacterial clones, each containing a plasmid or phage is called as

A
Gene pool

B
Genome

C
Gene library

D
Genophore

Solution

A genomic library is a collection of the total genomic DNA from a single organism. The DNA is stored in a population of identical vectors, each containing a different insert of DNA. In order to construct a genomic library, the organism's DNA is extracted from cells and then digested with a restriction enzyme to cut the DNA into fragments of a specific size. The fragments are then inserted into the vector using DNA ligase. Next, the vector DNA can be taken up by a host organism - commonly Escherichia coli or yeast - with each cell containing only one vector molecule. Using a host cell to carry the vector, allows for easy amplification and retrieval of specific clones from the library for analysis.
Question 8
1 / -0

Gene library refers to

A
DNA sequence information maintained in data bank

B
DNA fragments maintained in agarose gel

C
DNA fragments of a genome maintained by cloning in cultured cells

D
Photographs of DNA fragments printed in books

Solution

Gene library is a collection of fragments of DNA from an organism, tissue or any cell, which contains the entire genomic sequence or complementary DNA sequences.
So, the correct answer is "DNA fragments of a genome maintained by cloning in cultured cells".
Question 9
1 / -0

Assertion : Bird ringing was carried in 'Harike Pattan Sanctuary'.

Reason : Bird ringing was helpful in bird census.

A
Both the assertion and the reason are true and the reason is a correct explanation of the assertion.

B
Both the assertion and the reason are true but the reason is not a correct explanation of the assertion.

C
The assertion is true but the reason is false.

D
Both the assertion and reason are false.

E
The assertion is false but reason is true.

Solution

Harike wetland also known as "Hari-ke-Pattan", with the Harike lake in the deeper part of it, is the largest wetland in northern India in the Tarn Taran Sahib district of the Punjab state. The wetland was declared a bird sanctuary in 1982 and named as 'Harike Pattan Bird Sanctuary'. 'Bombay Natural History Society' (BNHS) carried out research and a bird ringing programme during the period 1980-85. An ornithological field laboratory was proposed to be established by BNHS.
Question 10
1 / -0

The National bird of New Zealand is

A
Pavo cristatus

B
Vultur gryphus

C
Apteryx

D
Cygnus cygnus

Solution

The national bird of New Zealand is kiwi belonging to the genus Apteryx. They are flightless birds, native to New Zealand. Thus, the correct answer is C.

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Re-Attempt Weekly Quiz Competition

Biodiversity and Conservation Test - 72

Result

Biodiversity and Conservation Test - 72

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SHARING IS CARING

Question 1

Tolerate dehydration and low temperature.

Tolerate low temperature but not dehydration.

Tolerate dehydration but not low temperature.

None of the above.

Solution

Question 2

26,000

2,600

4,600

260

Solution

Question 3

Genes

Seeds

Callus

Both B and C

Solution

Question 4

Swaminathan

Mendel

Vavilov

Borlaug

Solution

Question 5

Pine

Orchids

Oak

Rhododendrons

Solution

Question 6

2.4%

22%

8.1%

85%

70%

Solution

Question 7

Gene pool

Genome

Gene library

Genophore

Solution

Question 8

DNA sequence information maintained in data bank

DNA fragments maintained in agarose gel

DNA fragments of a genome maintained by cloning in cultured cells

Photographs of DNA fragments printed in books

Solution

Question 9

Both the assertion and the reason are true and the reason is a correct explanation of the assertion.

Both the assertion and the reason are true but the reason is not a correct explanation of the assertion.

The assertion is true but the reason is false.

Both the assertion and reason are false.

The assertion is false but reason is true.

Solution

Question 10

Pavo cristatus

Vultur gryphus

Apteryx

Cygnus cygnus

Solution

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