Crop plants grown in monoculture are:

  • low in yield

  • free from intraspecific competition

  • characterised by poor root system

  • highly prone to pests

Continued inbreeding can cause inbreeding depression. Whenever, this becomes a problem, selected animal of the breeding population should be mated with:

  • related superior animals of same breed

  • related superior animals of diffrent breed

  • unrelated superior animals of same breed

  • unrelated superior animals of different breed

The best plant explant to raise virus free plant is:

  • embryo

  • vessels

  • meristem

  • Leaf

The agriculture practice of breeding and raising livestock is called as:

  • Domestication

  • Breeding

  • Animal husbandry

  • Bio-fortification

Consider the following two statements:

I. In spite of having more than 70 per cent of the world livestock population, the contribution of india and china to the world farm produce is only 25 per cent.

II. The productivity per unit of cattle in these countries is very low.

  • Both I and II are true and II explains I

  • Both I and II are true but II does not explain I

  • I is true but II is false

  • Both the statements are not true

The management of animals for milk and its products for human consumption is called as:-

  • Animal breeding
  • Dairying
  • Domestication
  • Animal husbandry

Which of the following is the most important factor that would lead to increased milk yield in cattle ?

  • Selection of good breeds

  • Resistance to diseases

  • Stringent cleanliness and hygiene

  • Provision of ideal environmental conditions to cattle

Amongst the following the number of fresh water fishes is:

Catla, Rohu, Common carp, Hilsa, Sardines, Mackerel, Pomfrets

  • 2

  • 3

  • 4

  • 5

A group of animals related by descent and similar in most characters like general appearance, features, size, configuration, etc., are said to belong to a:

  • Variety

  • Species

  • Strain

  • Breed

The purposeful manipulation of plant species in order to create desired plant types that are better suited for cultivation, give better yields and are disease resistant is called:

  • Breeding

  • Genetic farming

  • Phytoremediation

  • r DNA technology

Hisardale is a new breed of:

  • Sheep developed by crossing Bikaneri ewes and Marino rams.

  • Sheep developed by crossing Bikaneri rams and Marino ewes.

  • Goat developed by crossing Bikaneri ewes and Marino rams.

  • Goat developed by crossing Bikaneri rams and Marino ewes.

Today, all our major food crops are derived from:

  • Wild varieties

  • Domesticated varieties

  • Genetically modified varieties

  • Plant tissue culture

There are several species of honeybees which can be reared. Of these the species reared in india is:

  • Apis indica

  • Apis dorsata

  • Trigona iridipennis

  • Apis mellifera

Consider the following two statements:

I. An effective germplasm collection is the prerequisite of any successful plant breeding program.

II. Genetic variability is the root of any breeding program.

  • Both I and II are true and II explains I

  •  Both I and II are true and II dose not explains I

  • I is true but II is false

  • I is false but II is true

Arrange the following steps of a plant breeding program in a correct chronological manner:

I. Selection and testing of superior recombinants

II. Collection of variability

III. Crosshybridization among the selected parents

IV. Evaluation and selection of parents

V. Testing, release and commercialization of new cultivars

  • II, IV, I, III, V

  • IV, I, II, III, V

  • II. IV, III, I, V

  • IV, III, II, I, V

The best breeding method for animals that are below average in produtivity in milk production would be:

  • Inbreeding

  • Out-crossing

  • Cross-breeding

  • Interspecific hybridisation

Identify the option where all columns are not correctly matched:

      Crop                 Variety                       Resistant to

  •   Wheat               Himgiri                        Leaf rust

  • Brassica             Pusa Swarnim               White rust

  • Cowpea             Pusa komal                   Black rot

  • Chilli                  Pusa sadabahar             Leaf curl

In mung bean the resistance to yellow mosaic virus and powdery mildew were introduced by:

  • Mutations

  • Hybridization

  • Tissue culture

  • Genetic engineering

Pusa Shubhra, an improved variety of cauliflower, is resistant to:

  • White rust

  • Bacterial blight

  • Black rot

  • Leaf curl

To obtain a virus free plant, what can be used as an explant in micropropogation ?

  • Apical meristem

  • Axillary meristem

  • Either apical or axillary meristem

  • Embryo

In plants, somatic embryo regeneration is induced usually by a relatively high concentration of:

  • Benzyl amino purine

  • IAA

  • 2,4 - D

  • NAA

Inbreeding depression in animals can be overcome by:

  • A single outcross

  •  Out cross for many generations

  • Cross-breeding

  • Inter-specific hybridization

Identify the incorrectly matched pair:

 

Crop Variety

Resistant to

1.

Himgiri

Leaf and stripe rust

2.

Karan rai

White rust

3.

Pusa sadabahar

Bacterial blight

4.

Pusa shubhra

Black rot

  • 1
  • 2
  • 3
  • 4

Meristem culture is especially important to obtain: 

  • Drought resistant plants

  • Virus free plants

  • Biofortified plants

  • Androgenic haploids

Consider the following statements:

I. Hairy leaves are associated with resistance to jassids in cotton and cereal leaf beetle in wheat

II. Low aspartic acid, high nitrogen and sugar content in maize leads to resistance to maize stem borers.

III. In wheat, solid stems lead to non preference by the stem sawfly and smooth leaved and nectar-less varieties of cotton do not attract bollworms

Which of the above statements are true?

  • I and II only

  • I and III only

  • II and III only

  • I, II and III

Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Column I

Column II

I. Pusa Swarnim

II. Pusa Shubhra

III. Pusa Komal

IV. Pusa Sawani

1. Cauliflower

2. Brassica

3. Okra

4. Cow pea

 

Codes

             I           II         III         IV

  •          1           2           3           4

  •          2           1           4           3

  •          2           1           3           4

  •          1           2           4           3

Which one is the wrong pairing for the disease and its causal organism?

  • late blight of potato-Alternaria solani

  • Black rust of wheat-Puccinia graminis

  • Loose smut of wheat-Ustilago nuda

  • Root-knot of vegetables-Meloidogyne sp.

Consider the following four measures (A-D) that could be taken to successfully grow chick pea in an area where bacterial blight disease is common

(A) spray with Bordeaux mixture

(B) control of the insect vector of the disease pathogen

(C) use of only disease-free seeds

(D) use of varieties resistant to the disease

Which two of the above measures can control the disease?

  • B and C

  • A and B

  • C and D

  • B and D

The crops engineered for glyphosate are resistant/tolerant to

  • fungi

  • bacteria

  • insects

  • herbicides

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

  • Bacterial leaf blight of rice

  • Downy mildew of grapes

  • Loose smut of wheat

  • Black rust of wheat

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Practice Botany Quiz Questions and Answers