IFS (Forests Services) Botany (Mains): Questions 125 - 135 of 160

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Question number: 125

» Physiology and Biochemistry » Photosynthesis

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Appeared in Year: 2013

Short Answer Question▾

Write in Short

Write short notes on each of the following: Phytochrome

Question number: 126

» Physiology and Biochemistry » Coenzymes

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Appeared in Year: 2013

Short Answer Question▾

Write in Short

Write short notes on each of the following: Apoenzyme

Question number: 127

» Ecology and Plant Geography » Endangered Plants

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Appeared in Year: 2013

Short Answer Question▾

Write in Short

Write short notes on each of the following: Endangered species

Question number: 128

» Physiology and Biochemistry » Senescence

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Appeared in Year: 2013

Short Answer Question▾

Write in Short

Write short notes on each of the following: Senescence

Question number: 129

» Cryptogams » Bryophytes

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Explain variation in male reproduction structures in liverworts.

Explanation

  • Variation in male reproduction structure in liverworts.

  • The Hepaticopsida class is called liverworts. It have two order in it marchantiales and Juungermanniales.

  • To differentiate between Male reproductive structures we have to study them individually.

Riccia

  • The mature antheridium is a globular, oval or club shaped embedded on th

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Question number: 130

» Cryptogams » Fungi

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the diffrerent type of flagella found in fungi?

Explanation

  • Higher fungi are immovable but lower fungi have two types of flagella in their reproductive cells.

  • It may be e 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 a

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Question number: 131

» Microbiology and Plant Pathology » Viruses

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

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

Explanation

Modelling

  • 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, visluization and communication tools with the goal of computer model of biology systems.

  • It involve in disease forcasting. now let us know diseas

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Question number: 132

» Cryptogams » Bryophytes

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Briefly discuss the phylogeny of algae.

Explanation

  • The term phylogeny is the evolutionary development and diversification of species or any perticular feature.

  • The alage 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 number: 133

» Phanerogams » Gymnosperms

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Why gymnosperms are called naked seeded plants?

Explanation

  • 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 beneath their cones scale

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Question number: 134

» Angiosperms » Brassicaceae

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the unique feature of Brassicaceae?

Explanation

  • Brassicaceae also known as Cruciferae (eg mustards)

  • 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 number: 135

» Phanerogams » Cordaitales

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

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.

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