Cryptogams-Bryophytes [IFS (Forests Services) Botany (Mains)]: Questions 9 - 18 of 18

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Question number: 9

» Cryptogams » Bryophytes

» Cryptogams » Pteridophytes

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Write notes on the distribution of bryophytes and pteridophytes in deciduous and evergreen forests of india.

Explanation

In india most of the land is covered with evergreen or decicious forest. hence in most of the area bryophytes and teridophytes are found.

Distribution of pteridophytes

  • Variable climate and altitude variantion and dur to this evergreen forest and decidious forest are foun all over the sub contimuette of india.

  • These forest are found in himalayas, ganga

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Question number: 10

» Cryptogams » Bryophytes

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

L. S. of capsule of Funaria.

Explanation

In Funaria, the capsule is slightly oblique asymmetrical. it is erect and green when young but become bright orange and curved at maturity. the complex internal structure of capsule can be studied in longitudinal section that is L. S. it has three distinct reasons apophysis, theca proper and apical region as

Image shows L.S Capsule Funaria

Image Shows L. S Capsule Funaria

Question number: 11

» Cryptogams » Bryophytes

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

Draw the well labelled diagram of L. S of strobilus of sleginella and discuss its main feature.

(Paper 2)

Explanation

  • The section of strobilus axis with which is attached micro and megasporophyll.

  • The strobilus shows the presence of both microsporangia and Megasporangia. In some species one side of the strobilus bears microsporangia and other side bears Megasporangia.

  • Usually the Megasporangia are located in the basal portion and the microsporangia in the upper port

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Question number: 12

» Cryptogams » Bryophytes

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Appeared in Year: 2015

Essay Question▾

Describe in Detail

With the help of suitable diagram, describe the development of sporophyte in bryophyte. (Paper 2)

Explanation

There are different types of development of sporophyte development found in bryophyte.

the development of sporophyte in bryophyte

The Development of Sporophyte in Bryophyte

Question number: 13

» Cryptogams » Bryophytes

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Appeared in Year: 2016

Essay Question▾

Describe in Detail

Discuss briefly the Peristome teeth of Funaria.

Explanation

  • In apical region of the capsule consists of two important parts, the operculum and peristome.

  • The peristome lies immediately below the operculum.

  • It is attached beneath the edge of the diaphragm and consists of two rings of long curved triangular teeth.

  • The teeth are simply the strips of cuticle and they are not cellular.

  • In the each ring there are 16

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Question number: 14

» Cryptogams » Bryophytes

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Appeared in Year: 2016

Essay Question▾

Describe in Detail

Explain the progressive sterilization of the sporogenous tissue in Bryophytes.

Explanation

  • Evolution of sporophyte by progressive sterilization of sporophyte is also known as theory of progressive evolution.

  • The sporophytes of complex forms have evolved due to progressive sterilization of the potential fertile tissue of the simpler forms.

  • In primitive form the sporophyte is simple and most of the tissue of the sporophyte is fertile.

  • The spo

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Question number: 15

» Cryptogams » Bryophytes

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Essay Question▾

Describe in Detail

Explain life cycle of Riccia.

Explanation

  • It is a Liverwort (Bryophytes).

  • Plant body is Gametophyte (n) and thallose (i. e. not differentiated in Root, Stem, Leaves) type.

Explain life cycle of Riccia

Explain Life Cycle of Riccia

  • In place of root, rhizoid is present.

  • Rhizoids are unbranched and unicellular. They are of two types smooth walled or tuberculated. In smooth walled rhizoid inner membrane is smooth but in tuberc

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Question number: 16

» Cryptogams » Bryophytes

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

Describe sporophyte development in Bryophytes with suitable illustrations.

Explanation

  • Evolution of sporophyte by progressive sterilization of sporophyte is also known as theory of progressive evolution.

  • The sporophytes of complex forms have evolved due to progressive sterilization of the potential fertile tissue of the simpler forms.

  • In primitive form the sporophyte is simple and most of the tissue of the sporophyte is fertile.

  • The spo

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Question number: 17

» Cryptogams » Bryophytes

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Appeared in Year: 2017

Essay Question▾

Describe in Detail

Describe Algal Phylogeny.

Explanation

  • 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 phylogenetic studi

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Question number: 18

» Cryptogams » Bryophytes

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Appeared in Year: 2017

Short Answer Question▾

Write in Short

Discuss the role of amphibious plants in the evolution of land plants.

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