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)
EditExplanation
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)
EditExplanation
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)
EditQuestion 4
Appeared in Year: 2016 (IFS)
Write in Short Short Answer▾
Distinguish between the Monoxylic and Pycnoxylic stem.
EditQuestion 5
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.
EditExplanation
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.
EditExplanation
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?
EditExplanation
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) …