IFS (Forests Services) Botany (Mains): Questions 79 - 86 of 287

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Question number: 79

» Physiology and Biochemistry » Chemiosmotic Theory

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Appeared in Year: 2014

Essay Question▾

Describe in Detail

Describe the process explained by chemiosmotic theory. (Paper 2, Section B)

Explanation

Chemiosmosis is the process by which chemical ions move from an area of high concentration to an area of low concentration across a selectively permeable membrane.

  • Chemiosmosis is the process by which ATP, or adenosine triphosphate, is synthesized.

  • The chemiosmotic hypothesis was proposed by Peter D. Mitchell in 1961. In 1978 the chemist was awarded

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Question number: 80

» Angiosperms » Anatomy

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Appeared in Year: 2013

Short Answer Question▾

Write in Short

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)

Question number: 81

» Angiosperms » Systematics

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Appeared in Year: 2013

One Liner Question▾

Write in Brief

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

Question number: 82

» Phanerogams » Gymnosperms

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Appeared in Year: 2013

Essay Question▾

Describe in Detail

Write brief and critical notes on the following: Affinities of Gymnosperms with Angiosperms (Paper 1, Section B)

Explanation

  • The plants are woody and perennial.

  • The stele is eustelic. Secondary growth as in dicots. The secondary wood may be manoxylic or pycnoxylic.

  • The vascular tissue is well developed, but vessels are absent (except in Gnetum). Phloem is devoid of companion cells.

  • Both are heterosporic and endosporic.

  • Megaspore is retained in the megasporangium resulting in

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Question number: 83

» Cryptogams » Pteridophytes

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Appeared in Year: 2013

Essay Question▾

Describe in Detail

Discuss briefly the following: Importance of Heterospory (Paper 1, Section A)

Explanation

  • Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants.
  • The condition of the production of two kinds of dissimilar spores, differing in shape and size in the same species is termed Heterospory.
  • Two types of spore producing structures in heterosporous species are microsporangia and macrosporangia.
  1. Mic

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Question number: 84

» Cryptogams » Fungi

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Appeared in Year: 2013

Essay Question▾

Describe in Detail

Differentiate between the following: Holocarpic and Eucarpic fungi (Paper 1, Section –A)

Explanation

In fungi, asexual reproduction is predominant and is depending upon the involvement of the entire thallus or a part of thallus, the fungi may be Holocarpic or Eucarpic.

Difference between Holocarpic and Eucarpic

Table showing the Difference between Holocarpic and Eucarpic

Holocarpic

Eucarpic

In Holocarpic fungi, the entire thallus gets converted into one or more reproductive bodies.

In Eucarpic fungi, only a part of the thallus is involved in the development of reproductive organs and remaining thallus remains vegetative.

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Question number: 85

» Plant Utility and Exploitation » Ethnobotany

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Appeared in Year: 2013

Essay Question▾

Describe in Detail

Write short notes on the following: Ethnobotany (Paper 1, Section B)

Explanation

  • Ethnobotany is the branch of ethnobiology and is the scientific study of the interrelationship between people and plants.

  • Ethnobotany is the science of people’s interactions with plants.

  • In Ethnobotany, ethno means study of people and botany means study of plants.

  • The term Ethnobotany was coined in 1895, by J. M. Harshberger, an American botanist at t

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Question number: 86

» Angiosperms » Systematics

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Appeared in Year: 2013

One Liner Question▾

Write in Brief

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

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