Fsc part 2 online preparation for biology chapter 19 (Growth and Development)

Online Short Questions For Chapter 5 "12th Class Biology Chapter 19 Short Questions Preparation "

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Biology - 12th Class Biology Chapter 19 Short Questions Preparation

Question # 1

Give the effect of temperature on plant growth.

  • Ans 1: Normal rate of growth increases with rise of temperature and decrease with decrease in temperature. For maximum growth the optimum temperature is 25 to 30oC and it is least at 5-10oC. But at very high temperature 35 to 40oC the rate of growth stops and plant may dies.
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Prepare Complete Set Wise Questions For Chapter 5 "12th Class Biology Chapter 19 Short Questions Preparation "

12th Class Biology Chapter 19 Short Questions Preparation - Set 1

Question # 1

Give the effect of temperature on plant growth.

  • Ans 1: Normal rate of growth increases with rise of temperature and decrease with decrease in temperature. For maximum growth the optimum temperature is 25 to 30oC and it is least at 5-10oC. But at very high temperature 35 to 40oC the rate of growth stops and plant may dies.
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12th Class Biology Chapter 19 Short Questions Preparation - Set 2

Question # 1

Define apical and intercalary meristem.

  • Ans 1: Apical meristem: Apical meristem found at the tips of shoot and root. The cells of apical meristem has ability to divide throughout plant life. These are basically related to extension of plant body.
  • Ans 2: Intercalary meristem: These are the part of apical meristem which get separated from apex by permanent tissues. They are situated at the base of internode. They play important role in production of leaves and flowers.
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12th Class Biology Chapter 19 Short Questions Preparation - Set 3

Question # 1

Define teratology and teratogens.

  • Ans 1: Study of abnormal development is called teratology. Factors causing abnormal development are called teratogens.
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12th Class Biology Chapter 19 Short Questions Preparation - Set 4

Question # 1

How are opaca differs from area pellucida?

  • Ans 1: Area pellucida: Central cells of blastoderm can be separated from yolk and giving the area of translucent appearance called Area pellucida.
    Area opaca: The peripheral part of balstderm where the cells are unseparated from the yolk is called area opaca.
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12th Class Biology Chapter 19 Short Questions

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