IFS (Forests Services) Botany (Mains): Questions 156 - 160 of 160

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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

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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 w

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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,

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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

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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,

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