Angiosperms (IFS (Forests Services) Botany (Mains)): Questions 1 - 10 of 33

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Question number: 1

» 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 bundle sheath) which has large chloroplast

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Question number: 2

» 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 egg and embryo develop from additional

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Question number: 3

» 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 at the point where the leaf blade m

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Question number: 4

» 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 an apetalous, pist

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Question number: 5

» Angiosperms » Applications of Palynology

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Comment upon the applied aspects of palynology. (Paper 1, Section B)

Explanation

Definition:

  • Palynology is the study of micro organic material such as spores, pollen, dinoflagellates and microfossils.

Applied aspects:

  • The distribution of spore genera and species in coal is an important tool to investigate stratigraphical problems like correlation of coal seams and oil fields.

  • It also helps in determining the age of roc

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Question number: 6

» Angiosperms » Pollination an Fertilization

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Explain what is parthenocarpy. (Paper 1, Section B)

Explanation

Definition:

  • Parthenocarpy is the production of fruit without fertilization of an egg in the ovary.
  • In botany and in horticulture, parthenocarpy means virgin fruits mean it is naturally or artificially induced fruit production without the fertilization of ovules.

  • The fruit produced by parthenocarpy is seedless.

  • Stenospermocarpy may also

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Question number: 7

» Angiosperms » Systematics

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Give the salient features of Engler and Prantl’s system of classification and compare it with that of Bentham and Hooker’s system of classification.

Explanation

Salient features of Engler and Prantl’s system:

  • Monochlamydeous is completely put an end to and families are distributed in the large series called Archichlamydeae.

  • This Engler system dominates over all the natural system but not to the rejection of other.

  • They accept the theory of descends and threw light or the phylogeny of various gr

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Question number: 8

» Angiosperms » Cucurbitaceae

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write down the botanical names and the uses of the plants of economic importance belonging to the family Cucurbitaceae. (Paper 1, Section B)

Explanation

  • Mainly all Cucurbitaceae family plants are economically important as vegetables used in kitchen, some plants have medicinal value and hard dried shells are used to form flasks as vessels and utensils.
  • It also used as blowpipe of snake charmer, drum for tambura, soraja etc. in making musical instrument.

  • Some plants are economically important

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Question number: 9

» Angiosperms » Anatomy

Appeared in Year: 2015

Essay Question▾

Describe in Detail

Write the distinguishing features of Orchidaceae. (Paper 1, Section B)

Explanation

About Orchidaceae

  • Orchidaceae is largest family in flowering plants and they are terrestrial, epiphytic or saprophytic herbs.
  • Orchid flowers are in different color except black.

  • Mainly found in warm and moist places and also found in dry or seasonally cold environment like savannahs and semi deserts.

  • The characteristics of the orchid fa

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Question number: 10

» 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).

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