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)
EditExplanation
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)
EditExplanation
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)
EditExplanation
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)
EditExplanation
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)
EditExplanation
Eusporangiate and Leptosporangiate Ferns
Based on development the sporangia have been classified by Goebel (1881) into two groups; Eusporangiate and Leptosporangiate.
Eusporangiate | Leptosporangiate |
… (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)
EditQuestion 107
Appeared in Year: 2013 (IFS)
Describe in Detail Subjective▾
Comment critically on the following: Advanced features of Asteraceae (Paper 1, Section B)
EditExplanation
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)
EditExplanation
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.
Spontaneous Fusion
- Spontaneous fusion means protoplasts isolated fuse spontaneously.
- Spontaneous fusion …
… (391 more words, 29 figures) …