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

What are phytochromes?

  • Ans 1: Phytochromes are blue light sensitive proteins found in plants. They exist in two form i.e,P660 andP730. They play an important role in photoperiodism.
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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

What are phytochromes?

  • Ans 1: Phytochromes are blue light sensitive proteins found in plants. They exist in two form i.e,P660 andP730. They play an important role in photoperiodism.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 2

Question # 1

What is genital herpes?

  • Ans 1: It is caused by herpes simplex type 2 virus, most frequently transmitted by sexual contact causing infection of the genitalia. It produces genital sorness and ulcers in the infected areas. In infected pregnant women,virus can transmitted to infant during birth,causing damage to eyes and CNS of the infant.
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12th Class Biology Chapter 18 Short Questions Preparation - Set 3

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 4

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 5

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 6

Question # 1

What is the role of P730 phytochrome in flowering?

  • Ans 1: P730 induce flowering in long day plant while inhibit flowering in short day plants.
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18th Chapter

12th Class Biology Chapter 18 Short Questions

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