Second Year Biology Chapter 18 Short Questions Online Preparation (Reproduction)

Online Short Questions For Chapter 4 "12th Class Biology Chapter 18 Short Questions Preparation "

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Biology - 12th Class Biology Chapter 18 Short Questions Preparation

Question # 1

Enlist methods of asexual reproduction.

  • Ans 1: Types of asexual reproduction are:-
  • Ans 2: a) Budding b) Parthenogenesis c) Cloning d) Tissue culture e) Apomixes f) Sporulation g) Vegetative propagation h) Artificial propagation
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12th Class Biology Chapter 18 Short Questions Preparation - Set 1

Question # 1

Enlist methods of asexual reproduction.

  • Ans 1: Types of asexual reproduction are:-
  • Ans 2: a) Budding b) Parthenogenesis c) Cloning d) Tissue culture e) Apomixes f) Sporulation g) Vegetative propagation h) Artificial propagation
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12th Class Biology Chapter 18 Short Questions Preparation - Set 2

Question # 1

Define parthenocarpy with example.

  • Ans 1: Formation of fruit without fertilization is called parthenocarpy. For example seedless grapes and banana.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 3

Question # 1

Name the hormones secreted by placenta.

  • Ans 1: Placental lactogen and progestron is secreted by the placenta.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 4

Question # 1

Define haploid parthenogenesis.

  • Ans 1: In the honey bees male develops without fertilization of egg. The queen bee carrying male gametes from the male has the ability to lay eggs that have not been fertilized.If these eggs are not fertilized then they develops in to haploid offspring. It is called haploid parthenogenesis.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 5

Question # 1

Define vernalization.

  • Ans 1: Chilling treatment give to the plant seeds before sowing is called vernalization.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 6

Question # 1

Define seed dormancy. Write its signifance. Give Its importance.

  • Ans 1: it is special condition of rest, which enables an embryo to survive the unfavorable environmental conditions.
  • Ans 2: Its importance is that during this period of rest the embryo ceases its growth.
  • Ans 3: This is of great survival importance to the plant in that it prevents the dormant seeds from germinating in response to condition such as long spell of warmth in winter.
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12th Class Biology Chapter 18 Short Questions

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