Angiosperms-Anatomy [IAS (Admin.) Mains Botany]: Questions 1 - 8 of 30

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Question 1

Appeared in Year: 2015 (IFS)

Describe in Detail Subjective▾

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

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Explanation

Salient Features of Family Poaceae

  • Small reduced flowers on tufted or caespitose plants with linear sheathing leaves.
  • Differing from the Cyperaceae with its round stems, hollow at the inter-nodes 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 …

… (127 more words) …

Question 2

Appeared in Year: 2015 (IFS)

Describe in Detail Subjective▾

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

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Explanation

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 savannas and semi deserts.
  • The characteristics of the orchid family are extremely smal…

… (149 more words, 1 figure) …

Question 3

Appeared in Year: 2013 (IFS)

Write in Short Short Answer▾

Draw scientifically accurate diagrams of the following and label the parts: T. S. of any stem showing interxylary and intraxylary phloem (Paper 1, Section B)

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Question 4

Appeared in Year: 2016 (IFS)

Write in Short Short Answer▾

Distinguish between the Monoxylic and Pycnoxylic stem.

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Question 5

Appeared in Year: 2016 (IFS)

Describe in Detail Subjective▾

Draw well-labelled diagram Tyloses.

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Explanation

Tyloses

  • Tyloses are the overgrowth on parenchymatous cells of xylem vessels of secondary heartwood.
  • It happens…

… (18 more words, 1 figure) …

Question 6

Appeared in Year: 2016 (IFS)

Describe in Detail Subjective▾

Distinguish between the Medullary and Cortical vascular bundles.

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Explanation

Medullary Vascular Bundle

  • Medullary vascular bundle is situated in the peripheral part of the pith of the stem and in some cases extended to the leaf trace.
  • They are generally small in size.
  • Medullary bundles do not supply to the lateral organs.
  • They traverse throughout the length of the stem without any branching.
  • Large number of medullary bundle is pr…

… (125 more words) …

Question 7

Appeared in Year: 2017 (IFS)

Describe in Detail Subjective▾

What is meant by Anomalous Secondary Growth? Give a descriptive account on comparison of normal and anomalous secondary growth in dicot with examples illustrations, wherever necessary.

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Explanation

Anomalous Secondary Growth

  • Anomalous secondary growth is the result of derivation in the cambial activity from the single cylindrical cambium that is normal type in most of the dicotyledons.
  • Anomalous growth is not only seen in dicotyledons but also seen in monocotyledons.
  • In anomalous secondary growth the position of cambium, number of cambium and fu…

… (419 more words, 50 figures) …

Question 8

Appeared in Year: 2018 (IFS)

Describe in Detail Subjective▾

What are cortical vascular bundles? How are they formed?

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Explanation

Cortical Vascular Bundle

Cortical vascular bundle is present in the cortical part.

  • Cortical vascular bundle allows transportation of water and nutrients through the voluminous cortex in cactus. And this unique feature of cactus help to replace water lost to the dry air.
  • Formation of Cortical Vascular Bundle
  • Cortical vascular bundle emerges radially fro…

… (130 more words, 24 figures) …