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.
Submit

12th Class Biology Chapter 19 Short Questions Preparation - Set 2

Question # 1

How do quantity and quality of light effect plant growth?

  • Ans 1: Light plays important role in the growth of plants:
    Quality of light: The red light favors elongation of cells and blue light enhances cell division but retards cell enlargement. Similarly ultraviolet rays also retard cell elongation.
    Quantity of light:Duration of light affects the growth vegetative & reproductive structures. It also plays a role in inducing or suppressing flowering. The phenomenon is termed as photoperiodism.
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12th Class Biology Chapter 19 Short Questions Preparation - Set 3

Question # 1

What are teratogens? Give an example.

  • Ans 1: Anything which interferes with the normal process of development is the factor causing abnormalities and are known as teratogens.
    For Example:Radiation,Maternal infections,Chemicals and drugs.
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12th Class Biology Chapter 19 Short Questions Preparation - Set 4

Question # 1

What are teratogens? Give an example.

  • Ans 1: Anything which interferes with the normal process of development is the factor causing abnormalities and are known as teratogens.
    For Example:Radiation,Maternal infections,Chemicals and drugs.
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12th Class Biology Chapter 19 Short Questions

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