IFS Botany: Questions 1 - 11 of 119

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Question number: 1

» Phanerogams » Cordaitales

Appeared in Year: 2015

Essay Question▾

Describe in Detail

TS of leaf of Cordaites. (Paper-1, Section-A)

Explanation

Image showing T.S of leaf of Cordaites.

Image Showing T. S of Leaf of Cordaites.

Cordaites are primitive trees that went extinct millions of years ago. In transverse section of leaf showing various part like xylem, phloem epidermis and bundle sheath.

Cordaites are primitive trees that went extinct millions of years ago. In transverse section of leaf… (10 more words) …

Question number: 2

» Angiosperms » C3 and C4 Plants

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What is Kranz anatomy. (Paper 1, Section B)

Explanation

Definition:

  • Kranz anatomy is a special structure in the leaves of plants that have a C4 pathway of carbon dioxide fixation.
  • The leaves contain a ring of mesophyll cells, containing a few small chloroplasts concerned with the initial fixing of carbon dioxide, surrounding a sheath of parenchyma cells (the… (225 more words) …

Question number: 3

» Cryptogams » Fungi

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What is the importance of VAM? (Paper-1, Section-A)

Explanation

Meaning of VAM

  • VAM means Vesicular Arbuscular Mycorrhizal.

  • Mycorrhiza is the product of an association between a fungus and plant root.

  • Vesicular arbuscular mycorrhiza (VAM) is a fungus and formed by the symbiotic association between certain phycomycetous fungi and angiosperm roots.

  • They help them to capture nutrients from the soil.… (222 more words) …

Question number: 4

» Phanerogams » Gnetales

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Compare the morphological characters of male and female strobili in Gnetum. (Paper-1, Section-A)

Explanation

Gnetum is dioecious.

  • The reproductive organs are organized into well-developed cones or strobili.

  • Gnetum have male and female reproductive organs on separate plants.

  • Gnetum belongs to gymnosperms so they do not have flowers and instead of that cones or strobili sporangia bearing structure present at the tip of the axis.… (119 more words) …

Question number: 5

» Angiosperms » Polyembryony

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write a brief and critical note on polyembryony and give its importance. (Paper 1, Section B)

Explanation

Definition:

  • Polyembryony is the process in which the fertilization of single egg leads to the formation of two or more embryos.
  • Polyembryony is common in mango and citrus.

Importance:

  • It is importance in the formation of identical twins.

  • Formation of embryos by cells of the embryo sac other than the… (222 more words) …

Question number: 6

» Angiosperms » Anatomy

Appeared in Year: 2015

Essay Question▾

Describe in Detail

What are the salient features of the family Poaceae? (Paper 1, Section B)

Explanation

  • Small reduced flowers on tufted or caespitose plants with linear sheathing leaves.

  • Differing from the Cyperaceae with its round stems, hollow at the internodes and leaves 2-ranked or arranged in 2 rows.

  • Sheathing leaf bases are also often open or loosely connected to the culm and often showing a ligule… (127 more words) …

Question number: 7

» Morphogenesis » Protoplast Culture

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Briefly discuss the technique for raising haploids from microspores. (Paper 1, Section B)

Explanation

  • Haploid plants possess only a single set of chromosomes in the sporophyte.
  • Haploid plants are significance for the production of homozygous plants and for the improvement of plants in plant breeding programmers.

Production of haploid plants:

Understanding the production of haploids

Understanding the Production of Haploids

Knowing the 2 types of production of haploids

  • Haploids… (442 more words) …

Question number: 8

» Cryptogams » Algae

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Comment upon the palmella stage. (Paper-1, Section-A)

Explanation

  • Palmella stage is a type of asexual reproduction and is found in some algae manly in Euglena and Chlamydomonas.

  • Palmella stage is formed in unfavorable conditions.

  • Under unfavorable conditions, zoospores are remain enclosed with the parent cell wall and is grows in size and divided and large numbers of zoospores… (129 more words) …

Question number: 9

» Morphogenesis » Cell

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Explain Allium type of embryo sac. (Paper 1, Section B)

Explanation

Allium is a bisporic type of embryo sac.

  • When two megaspore nuclei participate in the development of embryo sac it is known as bisporic type of embryo sac.

  • Bisporic development occurs when either chalazal or micropylar dyad undergoes the second meiotic division.

  • In Allium type, non-functional dyad degenerates and functional… (175 more words) …

Question number: 10

» Microbiology and Plant Pathology » Major Plant Diseases

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write short notes on the following: Tundu disease of wheat (Paper-1, Section-A)

Explanation

  • Tundu disease of wheat is also called as yellow Ear rot or Ear cockle.

  • Tundu is a minor disease problem worldwide.

  • It is quite common in north-west regions of India.

  • This disease of wheat was first reported by Hutchinson in 1917 from Punjab.

  • Now it is spread in many other… (277 more words) …

Question number: 11

» Angiosperms » Euphorbiaceae

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Explain Inflorescence of Euphorbiaceae (Paper 1, Section B)

Explanation

  • Euphorbiaceae flowers are unisexual (either male or female only) and they are often very small in size.
  • In Euphorbia, the flowers are reduced even more and then aggregated into an inflorescence or cluster of flowers known as a cyathium.

Cyathium:

  • Cyathium is an inflorescence consisting of a cup-shaped involucre enclosing… (143 more words) …

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