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

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Biology - 12th Class Biology Chapter 18 Short Questions Preparation

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 1

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 2

Question # 1

Differentiate between oviparous and viviparous.

  • Ans 1: Oviparous: Oviparous are the eggs laying animals like birds.
  • Ans 2: viviparous: Viviparous are those animals which give birth to their young ones like mammals
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12th Class Biology Chapter 18 Short Questions Preparation - Set 3

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 4

Question # 1

Define phytochromes and give its types.

  • Ans 1: Phytochromes are blue light sensitive proteins which receives the stimulus for flowering. They are of two type i.e, P660or red phytochrome and P730 or far red phytochrome.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 5

Question # 1

What is seed dormancy?

  • Ans 1: It is special condition of rest, which enables an embryo to survive the long period of unfavorable environmental conditions such as water shortage or low temperature.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 6

Question # 1

Differentiate between parthenocarpy and apomixes.

  • Ans 1: Apomixes: 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.
  • Ans 2: Parthenocarpy: 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

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