Optionals IAS Mains Botany: Questions 116 - 124 of 422

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Question 116

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Appeared in Year: 2013

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One Liner▾

Write the botanical name, family and part used of each of the following: Turmeric (Paper 1, Section B)

Question 117

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Appeared in Year: 2013

Describe in Detail

Essay▾

Discuss briefly the following: Diversity and distribution of Indian Pteridophytes (Paper 1, Section A)

Explanation

Diversity and Distribution of Indian Pteridophytes

  • There are 305 Genera and 13000 species of Pteridophytes all over the world.
  • India with a highly variable climate has a rich flora of Pteridophytes.
  • As far as diversity and distribution of Pteridophytic flora are concerned, there are about 1100 - 1200 species of ferns and its allies that are known to o

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Question 118

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Appeared in Year: 2013

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One Liner▾

Write the botanical name, family and part used of each of the following: Mint (Paper 1, Section B)

Question 119

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Appeared in Year: 2013

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Short Answer▾

Draw scientifically accurate diagrams of the following and label the parts: Floral diagram of Solanaceae (Paper 1, Section B)

Question 120

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Appeared in Year: 2013

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Short Answer▾

Write short notes on: Freeze-fracture technique

Question 121

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Appeared in Year: 2013

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Short Answer▾

Write Short Notes on: Extrinsic and Intrinsic proteins

Question 122

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Appeared in Year: 2013

Describe in Detail

Essay▾

Describe the structure and functions of Endoplasmic Reticulum.

Explanation

Endoplasmic Reticulum

  • Definition: The electron microscope reveals an extensive membrane system in the cytoplasm is called endoplasmic reticulum (ER).
  • The word endoplasmic reticulum was used for a lace-like network of tubules and vesicles observed by Porter, Claude and Fullam in 1945 in the first electron micrograph of cell.

Structure

  • Endoplasmic reticu

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Question 123

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Appeared in Year: 2013

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Short Answer▾

Write Short Notes on: Ultrastructure of Golgi apparatus and its chemical constituents

Question 124

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Appeared in Year: 2013

Describe in Detail

Essay▾

Write short notes on: Heterosis

Explanation

Heterosis

  • Heterosis is defined as the improvement in performance by individual offspring form the crossing over the performance of the parent population and increase in growth, size, yield or other characters in hybrids over those of the parents.
  • The increased productivity or superiority over the parents is known as Heterosis or hybrid vigour.

History

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