IFS (Forests Services) Botany (Mains): Questions 102 - 109 of 287

Access detailed explanations (illustrated with images and videos) to 287 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Unlimited Access for Unlimited Time! View Sample Explanation or View Features.

Rs. 700.00 or

How to register?

Question number: 102

» Morphogenesis » Totipotency

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

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

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 F

… (434 more words) …

Question number: 103

» Microbiology and Plant Pathology » Viruses

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

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

Explanation

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 transcribes itself into the

… (312 more words) …

Question number: 104

» Microbiology and Plant Pathology » Applications

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

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

Explanation

  • 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 Biopesticides:

  • B

… (251 more words) …

Question number: 105

» Cryptogams » Pteridophytes

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

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

Explanation

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

Differences between Eusporangiate and Leptosporangiate

Table showing the Differences between Eusporangiate and Leptosporangiate

Eusporangiate

Leptosporangiate

In eusporangiate, large sporangium develops from many initial cells and produces many spores.

In leptosporangiate, small sporangium develops from single initial cell and produces small definite number of spores.

… (128 more words) …

Question number: 106

» Angiosperms » Systematics

Edit

Appeared in Year: 2013

One Liner Question▾

Write in Brief

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

Question number: 107

» Angiosperms » Asteraceae

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

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

Explanation

  • 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 is no necessity for the insect to

… (144 more words) …

Question number: 108

» Morphogenesis » Protoplast Culture

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

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

Explanation

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.

Image Showing Protoplast Fusion Methods

Spontaneous Fusion:

  • Spontaneous fusion means protoplasts isolated fuse spontaneously.

  • Sponta­neous fusion is strictly intraspecific

… (390 more words) …

Question number: 109

» Angiosperms » Pollination an Fertilization

Edit

Appeared in Year: 2013

Essay Question▾

Describe in Detail

Comment on: Double fertilization and triple fertilization in Angiosperms (Paper 1, Section B)

Explanation

  • The process of double fertilization occurs in angiosperms (flowering plants).

  • In the process of double fertilization, out of the two sperm nucleus, one sperm nucleus fuses with the egg nucleus to form an embryo in process called syngamy and another male sperm nucleus fuses with polar nuclei to form endosperm in process is called triple fusion.

  • There

… (388 more words) …

Developed by: