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 placenta. Give its function.

  • Ans 1: Placenta acts as bridge between mother body and foetus. Once the placenta established it start secreting progesterone hormone which maintain pregnancy. Placenta also play role in transport of nutrients and oxygen to foetus and bring back waste from the foetus to mother body.
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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 placenta. Give its function.

  • Ans 1: Placenta acts as bridge between mother body and foetus. Once the placenta established it start secreting progesterone hormone which maintain pregnancy. Placenta also play role in transport of nutrients and oxygen to foetus and bring back waste from the foetus to mother body.
Submit

12th Class Biology Chapter 18 Short Questions Preparation - Set 2

Question # 1

What are functions of sertoli cells?

  • Ans 1: Fluid secreted by sertoli cells provides liquid medium, protection and nourishment to sperms while they are in tubules.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 3

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 4

Question # 1

Give importance of photoperiodism in plants.

  • Ans 1: Photoperiodism plays an important role in flowering of plants in long and short day plants.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 5

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 6

Question # 1

Define placenta. Give its function.

  • Ans 1: Placenta acts as bridge between mother body and foetus. Once the placenta established it start secreting progesterone hormone which maintain pregnancy. Placenta also play role in transport of nutrients and oxygen to foetus and bring back waste from the foetus to mother body.
Submit

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12th Class Biology Chapter 18 Short Questions

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