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

Differentiate between short day plant and long day plants with examples.

  • Ans 1: Short day plants: Short day plants flower when the days are short and nights are long e.g, tobacco,soybean.
  • Ans 2: Long day plants:Long day plant produce flowers when days are long and nights are short e.g, cabbage,spring wheat.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 1

Question # 1

Differentiate between short day plant and long day plants with examples.

  • Ans 1: Short day plants: Short day plants flower when the days are short and nights are long e.g, tobacco,soybean.
  • Ans 2: Long day plants:Long day plant produce flowers when days are long and nights are short e.g, cabbage,spring wheat.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 2

Question # 1

Give the function of interstitial cells of testis.

  • Ans 1: Interstitial cells produce testosterone. This hormone is essential for the successful production of sperms.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 3

Question # 1

Describe the process of cloning.

  • Ans 1: In animals especially vertebrate animals, a nucleus from the somatic cell is removed and introduced into an egg cell, whose nucleus has been destroyed by using UV light. The egg with transplanted to the parent who has contributed the nucleus.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 4

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 5

Question # 1

Define terms menstruation and menopause.

  • Ans 1: Menstrual cycle:In human females the periodic reproductive cycle is completed in approximately 28 days and involves changes in the structure and function of the whole reproductive system. It is called menstrual cycle.
  • Ans 2: Menopause:The end or complete stop of menstrual cycle is called menopause
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12th Class Biology Chapter 18 Short Questions Preparation - Set 6

Question # 1

What are Ovoviviparous?

  • Ans 1: In some animals like duck bill platypus internal fertilization leads to internal development of the young ones in a shelled egg and when development is completed shelled egg is laid which hatches the offspring, such animals are called ovaviviparous.
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12th Class Biology Chapter 18 Short Questions

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