IFS (Forests Services) Botany (Mains): Questions 10 - 17 of 287

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Question number: 10

» Microbiology and Plant Pathology » Major Plant Diseases

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write short notes on the following: Tundu disease of wheat (Paper-1, Section-A)

Explanation

  • Tundu disease of wheat is also called as yellow Ear rot or Ear cockle.

  • Tundu is a minor disease problem worldwide.

  • It is quite common in north-west regions of India.

  • This disease of wheat was first reported by Hutchinson in 1917 from Punjab.

  • Now it is spread in many other parts of the country like Haryana, U. P. , Rajasthan, M. P. and Bihar.

  • This diseas

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Question number: 11

» Angiosperms » Euphorbiaceae

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

Explain Inflorescence of Euphorbiaceae (Paper 1, Section B)

Explanation

  • Euphorbiaceae flowers are unisexual (either male or female only) and they are often very small in size.
  • In Euphorbia, the flowers are reduced even more and then aggregated into an inflorescence or cluster of flowers known as a cyathium.

Cyathium:

  • Cyathium is an inflorescence consisting of a cup-shaped involucre enclosing an apetalous, pistillate flowe

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Question number: 12

» Angiosperms » Applications of Palynology

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

Comment upon the applied aspects of palynology. (Paper 1, Section B)

Explanation

Definition:

  • Palynology is the study of micro organic material such as spores, pollen, dinoflagellates and microfossils.

Applied aspects:

  • The distribution of spore genera and species in coal is an important tool to investigate stratigraphical problems like correlation of coal seams and oil fields.

  • It also helps in determining the age of rocks.

  • The maxima

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Question number: 13

» Microbiology and Plant Pathology » Bacteria

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

Describe the role of microbes in production of antibiotics. (Paper-1, Section-A)

Explanation

Definition

Antibiotics are the chemical substances that can inhibit the growth and destroy the microorganisms.

  • Antibiotics are chemicals that kill or inhibit the growth of bacteria and are used to treat bacterial infections.

  • Antibiotics are derived from microorganisms or living system through fermentation process.

  • Over 2,500 years ago, Chinese used the

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Question number: 14

» Cryptogams » Algae

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

With the help of labelled diagram, describe the reproductive organs of Chara. (Paper-1, Section-A)

Explanation

  • Chara is aquatic attached to muddy or sandy bottom of the pools, lakes, flowing streams and ponds of clear water.
  • In Chara, reproduction is takes place by vegetative and sexual method.

Vegetative reproduction:

Vegetative reproduction is takes place by three ways;

(1) By amylum stars: The cells of some subterranean nodes become star-shaped and very much

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Question number: 15

» Microbiology and Plant Pathology » Fungal Toxins

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

What is the use of Bordeaux mixture? How is it prepared? (Paper-1, Section-A)

Explanation

Definition

  • Bordeaux mixture is a combination of copper sulfate, lime, and water.

  • Bordeaux mixture is an effective fungicide and bactericide that has been used for decades to control diseases of fruit and nut trees, vine fruits and ornamental plants.

  • Bordeaux mixture is an outstanding fungicide and bactericide for controlling some diseases of tree frui

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Question number: 16

» Cryptogams » Pteridophytes

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

Draw a well-labelled diagram through median LS of strobilus of Selaginella and discuss its main features. (Paper-1, Section-A)

Explanation

Knowing theLS of strobilus of Selaginella

Knowing theLS of Strobilus of Selaginella

  • Selaginella is unique, however, from other lycophytes in that their strobili contain two different types of spores; megaspores and microspores.

  • There are two types of sporangia in Selaginella; Megasporangia and Microsporangia.

Megasporangia

  • Megasporangia are borne on megasporophylls.

  • Megasporangium is greenish a

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Question number: 17

» Cryptogams » Fungi

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

Describe the asexual reproduction in Penicillium. (Paper-1, Section-A)

Explanation

  • Penicillium is saprophytic fungus and grows on vegetative fruits, meat and many other moist.

Asexual reproduction

  • In Penicillium, asexual reproduction takes place by conidia which are developed on conidiospores.

  • Conidia are non-motile and asexual spores.

  • Conidia are produce at the tip of special, erect, hyphae called conidiophores.

  • Many crops of conidia

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