IFS (Forests Services) Botany (Mains): Questions 50 - 58 of 124

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Question number: 50

» 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 epidermis and

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Question number: 51

» Ecology and Plant Geography » Afforestation

Appeared in Year: 2015

Short Answer Question▾

Write in Short

Write an account of ‘Joint Forest Management Programme’ (JFMP). How does people’s participation ensure sustainable forest resource management? (Paper 2, Section B)

Question number: 52

» Phanerogams » Gymnosperms

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Comment on the structure, location and function of transfusion tissue. (Paper A Section A)

Explanation

Definition:

  • Transfusion tissue is lying on the vascular bundles of gymnosperm leaves and consists of both living cells like those of parenchyma with walls that are not lignified and thin-walled but lignified tracheids with bordered pits.
  • Transfusion tissue is composed of tracheids with bordered pits and parenchyma cells containing tannin-like
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Question number: 53

» 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 organisms lacking
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Question number: 54

» Cell Biology » Cell Cycle

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write brief notes on: “Tricarboxylic acid cycle is an amphibolic process. ” Explain. (Paper 2, Section B)

Explanation

  • Tricarboxylic acid cycle (TCA) is also called as Citric acid cycle or Kreb’s cycle.
  • Amphibolic pathway is a biochemical pathway that serves both anabolic and catabolic processes. An important example of an amphibolic pathway is the Krebs cycle, which involves both the catabolism of carbohydrates and fatty acids and the
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Question number: 55

» Physiology and Biochemistry » Stress Physiology

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write brief notes on: What is ‘triple response growth’? How is it induced? (Paper 2, Section B)

Explanation

Triple response caused by the plant hormone ethylene and plant has a decrease in longitudinal growth and a switch to horizontal growth.

Ethylene removes this auxin imbalance and helps the seedling to grow properly.

How triple response induced:

Ethylene is a phytohormone or hormone which is produced in the plant

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Question number: 56

» 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: 57

» Plant Utility and Exploitation » Botanical Gardens and Herbaria

Appeared in Year: 2014

Essay Question▾

Describe in Detail

Differentiate between Isotype and Syntype. (Paper - 1, Section - B)

Explanation

Isotype:

  • A duplicate specimen of the holotype is called isotype and it is always a specimen.

  • An isotype is a biological specimen duplicate of the holotype collected in the same place and at the same time and by the same person.

  • Sometimes the collection number is also the same and

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Question number: 58

» Angiosperms » Brassicaceae

Appeared in Year: 2014

Essay Question▾

Describe in Detail

What are unique features of Brassicaceae? (Paper - 1, Section - B)

Explanation

Unique features of Brassicaceae:

  • Habit: Usually annual or perennial herbs.

  • Root: Taproot system.

  • Stem: Herbaceous, erect and branched.

  • Leaves: - Simple, alternate, radical, usually entire, deeply lobed and pinnatifid (pinnately divided).

  • Flowers: - Bisexual, heterochlamydeous, actinomorphic and without subtending bracts (ebracteate).

  • Calyx: - 4 sepals, polysepalous and imbricate

… (107 more words) …

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