IFS (Forests Services) Botany (Mains): Questions 152 - 161 of 225

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Question number: 152

» Plant Breeding, Biotechnology and Biostatistics » Micropropagation

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Explain to what extent has the technique of Micropropagation been successful in achieving our goals.

Explanation

The techniques of Micropropagation has been successful in achieving our goals upto very long extent some of the examples are that Micropropagation techniques are now after preferred to conventional practices of a sexual propagation because of the given reasons not only for commercial point of you but also with regard to crop improvement program-

  • Sma

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Question number: 153

» Microbiology and Plant Pathology » Viruses

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate between Palaeozoic and Cenozoic plants.

Explanation

Types of plant found in Palaeozoic ERA and Cenozoic Era

Palaeozoic era

  • The vegetation is both aquatic and land plants.

  • Aquatic plants like Nematothallus and prototaxites showed resemblance with thallophytes. The first Fossil of land plants were found in the Silurian and Devonian period of this era.

  • Manograptus, sporogonites, zosterophyllum, cooksonia,

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Question number: 154

» Angiosperms » Ranunculaceae

» Angiosperms » Rosaceae

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Floral formula diagram of Ranunculaceae and Rosaceae.

Explanation

In ranunculaceae family there are generally three type of floral structure are seen. They are ranunculus, delphinium, clematis. Some examples are Butter cup, Larkspur, Virgins-bower.

Ranunculacese

Image shows Ranunculacese

Image Shows Ranunculacese

Image shows Ranunculacese

Image shows Delphinium

Image Shows Delphinium

Image shows Delphinium

Image shows Clematis

Image Shows Clematis

Image shows Clematis

Rosaceae

In Rosaceae f

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Question number: 155

» Angiosperms » Embryology

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate megasporangenesis and mega gametogenesis.

Explanation

Megasporogenesis and mega gametogenesis

  • Megasporogenesis and mega gametogenesis is a very important process in angiosperms.

  • The ovule develops as multicellular Placenta outgrowth. In further development nucleus and one or two integuments are formed.

  • Hypodermal cell of nucleus become differentiated from the other and that’s call archesporial.

  • Archespora

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Question number: 156

» Microbiology and Plant Pathology » Basis of Infection

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Explain the molecular basis of plant –pathogen interaction.

Explanation

  • During the contact between plants and pathogen a particular chain of events happen in the plant,

  • The plant is provided by receptor that interacts with bacterial protein; as a result quick protective reaction is being developed.

  • The protein of pathogenic organism are virulent for the given plant genotype.

  • The plant is affected by the pathogen whereas p

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Question number: 157

» Phanerogams » Gymnosperms

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Comment on the structure, location, function of transfusion tissue.

Explanation

Transfusion tissue is the tissue that is found around the vascular bundle of gymnosperm leaves.

Structure and location

  • There are group of bracket like cells on the lateral side of the vascular xylem in the mid represent the cells are small and broad pits and have reticulate thickening on there was there called transfusion tissue.

  • In the wings region l

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Question number: 158

» Plant Utility and Exploitation » Things We Get from Plants

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Write the botanical name, family, active constituents and uses of any five medicinal plants of commercial importance in India.

Explanation

1. Rauvolifia (sarpgandha)

Botanical name- Rauvolifia serpentine

Family-Apocynaceae

Active constituents-alkaloid reserpine, serpentine, deserpidine, ajmaline, ajmalicine, yohimbine, isoaimaline

Uses

  • Drug obtained from Rauvolifia root used for relief from nervous disorders.

  • Used to relif from nervous disorders including anxity, excitement, maniacal behavi

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Question number: 159

» Microbiology and Plant Pathology » Viruses

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Compare benthum and hooker’s of classification with the system of classification with the system of classification of Hutchinson.

Explanation

To compare classification of Bentham & hooker and Hutchinson classification. First of all we have to study both the classification and their basics

Bentham and hooker classification

  • This system is based on the de Candolle system.

  • It is natural system and was never intended to express a phylogenetic scheme of classification.

  • The system is imbued with th

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Question number: 160

» Cryptogams » Algae

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the pigments that are found in red algae?

Explanation

  • Rhodophyceae commonly known as red algae, due to presence of red pigment. R-phycoethyrine is water soluble red pigment which is responsible for its red colour which mask ups the green chlorophyll a.

  • Along with r-phycoethyrine other photosynthesis pigments are also present in Rhodophyceae group of algae they are chlorophyll a, chlorophyll d, Alpha ca

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Question number: 161

» Angiosperms » Systematics

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Stages depicting the formation of vegetative and generative cells during male gametophyte development in angiosperms.

Explanation

The pollen grain divide and form two unequal cells. large one is vegetative cell and smaller one is called generative cell. that after series event they form two male gametes and one vegetative nucleus which fuses with female egg to form embryo and endosperm.

The steps and different stages of development of male gametophyte is shown in following dia

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