Optionals IAS Mains Botany: Questions 130 - 138 of 511

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Question 130

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Appeared in Year: 2014 (IFS)

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What are the diffrerent type of flagella found in fungi?

Explanation

Flagella Found in Fungi

  • Higher fungi are immovable but lower fungi have two types of flagella in their reproductive cells.
  • It may be uniflagellate or biflagellate for example fungi of Phycomycetes reproductive cells.
  • They have two types of flagella whiplash and tinsel.

Whiplash Flagella

  • Whiplash flagella are unbranched flagella with smooth surface with …

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Question 131

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Appeared in Year: 2014 (IFS)

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What is meant by modelling and how does it help in disease forecasting?

Explanation

Modelling and Disease Forecasting

  • Modelling is a significant task of systematic biology. Modelling is significant task to make forecasting models.
  • It aims to develop and use efficient algorithms, data, and structure, visualisation and communication tools with the goal of computer model of biology systems.
  • It involve in disease forecasting now let us k…

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Question 132

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Appeared in Year: 2014 (IFS)

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Briefly discuss the phylogeny of algae.

Explanation

Phylogeny of Algae

  • The term phylogeny is the evolutionary development and diversification of species or any particular feature.
  • The algae are an assemblage of morphologically diverse, photosynthetic protists that are ubiquitous in distribution.
  • to understand algal phylogeny, it has been revolutionized with molecular evolutionary methods.
  • The molecular …

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Question 133

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Appeared in Year: 2014 (IFS)

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Why gymnosperms are called naked seeded plants?

Explanation

Gymnosperms as Naked Seeded Plants

  • The earliest seed plants produced seeds that sat unprotected on the surface of leaves or modified stems.
  • As they are first vascular plants that are totally independent of water bodies for their fertilization as there e ancestor needs water for their fertilization purpose.
  • These first seed plants hide their seed benea…

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Question 134

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Appeared in Year: 2014 (IFS)

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What are the unique feature of Brassicaceae?

Explanation

Unique Features of Brassicaceae

  • Brassicaceae also known as Cruciferae (eg mustard) .
  • Plants are herbs with alternation extipulate leaves.
  • Petals are, free and cruciform.
  • Stamens are 6 and tetrsdynamous.
  • Ovary is unilocular but becomes bilocular later.
  • Flower is generally actnomorphic but rarely zygomorphic.
  • Flower is hermoaphrodite. It means flower that h…

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Question 135

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Appeared in Year: 2014 (IFS)

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Give the concise account of Cordaitales and justify why they form an important group.

Explanation

Cordaitales

  • The order consist extinct plants which were originated in the Devonian period.
  • In carboniferous period they flourished well in the form of thick forests of the world and ultimately vanished in the Triassic Period.
  • there are some characteristic features of the members are
  • The plants were tall and formed dense forest.
  • Secondary growth and dist…

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Question 136

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Appeared in Year: 2014 (IFS)

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Citing suitable examples, explain how laxity is quarantine procedure can have disastrous effects.

Explanation

Quarantine Procedure

  • Plant quarantine is a type of prophylactic measure.
  • The prophylactic measure is preventive and includes protection of the host from exposure to the pathogen from infection or from environmental factors favourable to disease development.
  • Plant quarantine is a legal restriction to the national or international level on the trade of …

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Question 137

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Appeared in Year: 2014 (IFS)

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Differentiate between prokaryotes and eukaryotes.

Explanation

Prokaryotes and Eukaryotes

  • Prokaryotes are organism which have prokaryotic type of cells whereas eukaryotes are the organism which have Eukaryotic type of cells.
  • prokaryotic are basically one envelope system in comparison to Eukaryotic they are smaller in size.
  • unlike Eukaryotic they lack double membrane cell organelle e. g. endoplasmic reticulum mito…

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Question 138

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Appeared in Year: 2014 (IFS)

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“Ethnobotany provides important clues to the discovery of Morden drugs.” Justify the statement giving suitable example.

Explanation

Ethnobotany

  • Ethnobotany the ancient man has accurate recognition of non-poisonous plants that he can utilise.
  • In India study of plant in Rigveda that divided into three parts vrska, Osadhi, Virudha (the Creepers) .
  • Ethnobotany is a term that is derived from the ethnology (that is study of culture) .
  • The scientific study of the relationship that exists …

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