Cryptogams (IFS (Forests Services) Botany (Mains)): Questions 10 - 18 of 25

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Question number: 10

» Cryptogams » Fungi

Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the different types of flagella found in fungi? (Paper A Section A)

Explanation

  • There are mainly two types of flagella;
Image showing flagella types.

Image Showing Flagella Types.

Based on cilia or hair and fibrils, flagella divided into two parts.

Tinsel type: Flagellum with a large number of hair like outgrowths (cilia) all around its surface.

Whiplash type: A long thread like structure being rigid at the base with 11 fibrils and thinner towards t

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Question number: 11

» Cryptogams » Algae

Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the pigments that are found in red algae? (Paper A Section A)

Explanation

  • Red algae is also known as Rhodophyta and they are marine plants that live mainly in shallow waters and deep tropical seas and some are live in freshwater.
  • Red algae have no flagella and typically grow attached to a hard surface or on other algae.
 Image showing red algae.

Image Showing Red Algae.

Rhodophyta is also called as red algae and is name for their reddish colour due to their pigments phycoerythrin because this pigment reflects red light and absorbs blue light.

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Question number: 12

» Cryptogams » Bryophytes

Appeared in Year: 2014

Short Answer Question▾

Write in Short

What is the heterotrichous habit of moss protonema growth? (Paper A Section A)

Question number: 13

» Cryptogams » Fungi

Appeared in Year: 2014

Essay Question▾

Describe in Detail

How significant is the parasexuality in Aspergillus? (Paper A Section A)

Explanation

Definition of parasexuality or parasexual cycle:

  • The parasexual cycle is defined as a cycle in which plasmogamy, karyogamy and meiosis take place but not at a specified time or at specified points in the life cycle of an organism.
  • In some fungi true sexual cycle comprising of nuclear fusion and meiosis is absent. These fungi derive the benefits

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Question number: 14

» Cryptogams » Pteridophytes

Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are the xerophytic and hydrophytic characters found in the rhizome anatomy of Equisetum? (Paper A Section A)

Explanation

Xerophytic characters of Equisetum plant are:

  • Presence of thick coat of cuticle all over the epidermal layer of stem.

  • Photosynthetic stem having chlorenchymatous cortex.

  • Stem behaving as leaves.

  • Presence of small, scale like leaves with limited number of chloroplast.

  • Presence of sunken stomata in groove of stem.

  • Stiff epider

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Question number: 15

» Cryptogams » Algae

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Comment on the contractile vacuoles in Euglena. (Paper A Section A)

Explanation

Contractile vacuoles:

  • Contractile vacuole is a single vacuole and osmotically collected water and then is reformed by a progressive clotting of smaller vacuoles.
  • Contractile vacuoles protect a cell from absorbing too much water and potentially exploding by excreting excess water.

Contractile vacuoles in Euglena:

  • Euglena is single celled organi

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Question number: 16

» Cryptogams » Algae

Appeared in Year: 2014

Short Answer Question▾

Write in Short

Write a brief note on the advantage of diploid carposporophyte generation in red algae. (Paper A Section A)

Question number: 17

» Cryptogams » Bryophytes

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Draw scientifically accurate diagrams of the following and label the parts: L. S. of capsule of Funaria (Paper - 1, Section - B)

Explanation

Image showing L.S. of capsule of Funaria

Image Showing L. S. Of Capsule of Funaria

Capsule is a part of sporophyte and the sporophyte in Funaria is called as sporogonium and is green in colour while is young and become reddish brown at mature.

Funaria capsule:

  • A mature sporogonium or sporophyte of Funaria is borne at the end of the female branch.

  • It differentiated into foot, set

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Question number: 18

» Cryptogams » Pteridophytes

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Discuss briefly the following: Importance of Heterospory (Paper 1, Section A)

Explanation

  • Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants.
  • The condition of the production of two kinds of dissimilar spores, differing in shape and size in the same species is termed Heterospory.
  • Two types of spore producing structures in heterosporous species are microsporangia and macrosporangi

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