Optionals IAS Mains Botany: Questions 44 - 51 of 511
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Question 44
Appeared in Year: 2014 (IFS)
Describe in Detail
Essay▾What are the pigments that are found in red algae? (Paper A Section A)
Explanation
Pigments Found in Red Algae
- Red algae is also known as Rhodophyta and they are marine plants that live mainly in shallow waters and deep tropical seas and some are live in freshwater.
- Red algae have no flagella and typically grow attached to a hard surface or on other algae.
- Red algae contain d…
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Question 45
Appeared in Year: 2014 (IFS)
Write in Short
Short Answer▾What is the heterotrichous habit of moss protonema growth? (Paper A Section A)
Question 46
Appeared in Year: 2014 (IFS)
Describe in Detail
Essay▾How significant is the parasexuality in Aspergillus? (Paper A Section A)
Explanation
Parasexuality or Parasexual Cycle
- The parasexual cycle is defined as a cycle in which plasmogamy, karyogamy and meiosis take place but not at a specified time or at specified points in the life cycle of an organism.
- In some fungi true sexual cycle comprising of nuclear fusion and meiosis is absent. These fungi derive the benefits of sexuality through…
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Question 47
Appeared in Year: 2015 (IFS)
Write in Short
Short Answer▾What are ‘carrier proteins’ ? Describe the ion uptake mechanism in plants mediated by carrier proteins. (Paper 2, Section B)
Question 48
Appeared in Year: 2014 (IFS)
Describe in Detail
Essay▾Explain to what extent has the technique of micropropagation been successful in achieving our goals. (Paper A Section A)
Explanation
Micropropagation
- The regeneration of whole plant through tissue culture is popularly called micropropagation.
- This is a technique where a callus mass has been initiated from a single ex-plant taken from any living part of a donor plant and within very short time and space, a large number of plantlets can be produced from such callus tissue.
- Again repe…
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Question 49
Appeared in Year: 2014 (IFS)
Describe in Detail
Essay▾Differentiate between prokaryote and eukaryote. (Paper A Section A)
Explanation
Prokaryotic Cells
- Prokaryotic cells are ells without nucleus.
- The DNA in prokaryotic cells is in the cytoplasm rather than enclosed within a nuclear membrane.
- Prokaryotic cells are found in single celled organisms like bacteria and organisms with prokaryotic cells are called prokaryotes.
Eukaryotic Cells
- Eukaryotic cells ar…
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Question 50
Appeared in Year: 2014 (IFS)
Describe in Detail
Essay▾What are the xerophytic and hydrophytic characters found in the rhizome anatomy of Equisetum? (Paper A Section A)
Explanation
Xerophytic Characters of Equisetum Plant
- Presence of thick coat of cuticle all over the epidermal layer of stem.
- Photosynthetic stem having chlorenchymatous cortex.
- Stem behaving as leaves.
- Presence of small, scale like leaves with limited number of chloroplast.
- Presence of sunken stomata in groove of stem.
- Stiff epidermis and presence of ridges and furr…
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Question 51
Appeared in Year: 2015 (IFS)
Write in Short
Short Answer▾Write an account of ‘Joint Forest Management Programme’ (JFMP) . How does people՚s participation ensure sustainable forest resource management? (Paper 2, Section B)