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

Define vernalization.

  • Ans 1: Chilling treatment give to the plant seeds before sowing is called vernalization.
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Prepare Complete Set Wise Questions For Chapter 4 "12th Class Biology Chapter 18 Short Questions Preparation "

12th Class Biology Chapter 18 Short Questions Preparation - Set 1

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 2

Question # 1

What are test tube babies?

  • Ans 1: Parental sperms and ovum is fertilized in vitro,(outside the female body) and then zygote is implanted back into mother uterus, placenta established and remaining development takes place in the body of the mother leading to normal birth.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 3

Question # 1

Write about the disease syphilis? Or Give causes and symptoms of syphilis?

  • Ans 1: It is caused by a spirochete, Treponema pallidum. It damages the reproductive organs,eyes,bones,joints,CNS,heart and skin. Sexual contact is major source of its spread.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 4

Question # 1

Why seed plants are predominantly present all around as?

  • Ans 1: Seed plants are very common around us become these plants are have many adaptations to survive on land like protected seeds,flower and fruit formation.Seed dispersal plays an important role in distribution of flowering plants.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 5

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 Preparation - Set 6

Question # 1

Differentiate between lactation and gestation.

  • Ans 1: Lactation: Lactation means discharge or production of milk from the mammary gland after child birth.
  • Ans 2: Gestation: Gestation is the total time period of pregnancy is called gestation. In human gestation period is of nine months.
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18th Chapter

12th Class Biology Chapter 18 Short Questions

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