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 labour pain.

  • Ans 1: At the time of birth, the reduction of progesterone level stimulates pituitary gland to produce oxytocin. This induces labour pain or contraction of the uterus wall.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 1

Question # 1

Define labour pain.

  • Ans 1: At the time of birth, the reduction of progesterone level stimulates pituitary gland to produce oxytocin. This induces labour pain or contraction of the uterus wall.
Submit

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

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 3

Question # 1

Differentiate between isomorphic and heteromorphic generation.

  • Ans 1: Isomorphic:If gemetophtye and sporophyte generation are vegetatively and morphologically similar then they are called isomorphic generation.
  • Ans 2: Heteromorphic: Ifgametophyte and sporophyte generations are vegetatively and morphologically dissimilar then they are called heteromorphic generations
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12th Class Biology Chapter 18 Short Questions Preparation - Set 4

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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12th Class Biology Chapter 18 Short Questions Preparation - Set 5

Question # 1

What is corpus luteum? Give its function.

  • Ans 1: The follicle cells after release of the egg are modified to from a special structure called corpus leuteum. It produces progesterone.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 6

Question # 1

What is Apomixes? Or What is meant by Apomixes?

  • Ans 1: In apomixes a diploid cell either from the nucellus or megaspore develops into a functional embryo in the absence of a male gamete. The rest of the ovule develops into seed and ovary into fruit.
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12th Class Biology Chapter 18 Short Questions

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