IAS (Admin.) Mains Botany: Questions 101 - 108 of 1252

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Question 101

Appeared in Year: 2013 (IFS)

Describe in Detail Subjective▾

Comment on the following: Magnoliaceae – Primitive characters (Paper 1, Section B)

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Explanation

Primitive Characters of Magnoliaceae

  • Large flowers with numerous petals and sepals (called tepals because they are similar in size and shape) .
  • The elongated floral axis bearing several free perianth segments, usually spirally arranged, the numerous stamens and carpels.
  • Radially symmetrical flower.
  • Alternative and simple leaves.
  • Cone-like appearance of …

… (59 more words, 7 figures) …

Question 102

Appeared in Year: 2013 (IFS)

Describe in Detail Subjective▾

Distinguish between the following: Totipotency and Pluripotency (Paper 1, Section B)

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Explanation

Totipotency

  • Totipotency is the genetic potential of a plant cell to produce the entire plant.
  • Totipotency defines as the capable of developing into a complete organism or differentiating into cells or tissues.
  • Regenerating of an entire plant from a single or few non-zygotic cells was proposed by Gottlieb Haberlandt in 1902. Haberlandt is called the Fa…

… (435 more words, 17 figures) …

Question 103

Appeared in Year: 2013 (IFS)

Describe in Detail Subjective▾

Write a brief account of the following: Lytic and Lysogenic cycle (Paper 1, Section A)

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Explanation

Lytic and Lysogenic Cycle

  • Lytic and Lysogenic cycles are two different methods of viral replication.
  • While they are different, they can be interchangeable or the replication can involve both methods in separate phases.

The Lytic Cycle

  • In the lytic cycle, which is considered the main cycle in viral replication, once the viral DNA enters the cell it tran…

… (320 more words, 21 figures) …

Question 104

Appeared in Year: 2013 (IFS)

Describe in Detail Subjective▾

Discuss briefly the following: Biopesticides (Paper 1, Section A)

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Explanation

Biopesticides

  • Biopesticides are certain types of pesticides derived from such natural materials as animals, plants, bacteria, and certain minerals.
  • Biopesticides are those biological agents that are used for control of weeds, insects and pathogens.
  • The micro-organisms used as biopesticides are viruses, bacteria, protozoa, fungi and mites.

Classes of Bi…

… (252 more words) …

Question 105

Appeared in Year: 2013 (IFS)

Describe in Detail Subjective▾

Differentiate between the following: Eusporangiate and Leptosporangiate ferns (paper 1, Section A)

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Explanation

Eusporangiate and Leptosporangiate Ferns

Based on development the sporangia have been classified by Goebel (1881) into two groups; Eusporangiate and Leptosporangiate.

Table Showing the Differences between Eusporangiate and Leptosporangiate
EusporangiateLeptosporangiate

… (157 more words, 8 figures) …

Question 106

Appeared in Year: 2013 (IFS)

Write in Brief One Liner▾

Write the botanical name, family and part used of each of the following: Eggplant (Paper 1, Section B)

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Question 107

Appeared in Year: 2013 (IFS)

Describe in Detail Subjective▾

Comment critically on the following: Advanced features of Asteraceae (Paper 1, Section B)

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Explanation

Advanced Features of Asteraceae

  • Herbaceous nature of the majority taxa.
  • Aggregation of flowers into heads or capitula with attractive ligulate florets and dense tubular disc florets.
  • The capitula are surrounded by conspicuous involucral bracts.
  • The construction of capitula enables a single visit of insect can help in pollinating several florets, there …

… (151 more words) …

Question 108

Appeared in Year: 2013 (IFS)

Describe in Detail Subjective▾

Write Short Notes on: Methods of protoplast fusion (Paper 1, Section B)

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Explanation

Methods of Protoplast Fusion

  • Protoplast fusion is the joining of two plant cells together to form one cell with multiple nuclei.
  • There are two methods of Protoplast fusion; Spontaneous fusion and induced fusion.
Image Showing Protoplast Fusion Methods

Spontaneous Fusion

  • Spontaneous fusion means protoplasts isolated fuse spontaneously.
  • Spontaneous fusion …

… (391 more words, 29 figures) …