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

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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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

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 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

How neural plate is formed?

  • Ans 1: on the dorasal surface of the gastrula,over the notochord,presumptive neural ectoderm is present in the form of band. As gastrula elongates,the band thickens to from a neural plate.
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12th Class Biology Chapter 19 Short Questions Preparation - Set 4

Question # 1

Differentiate between primary growth and secondary growth in plant.

  • Ans 1: Primary growth: occur due to the activity of apical meristem which results increase in length or height of plant.
  • Ans 2: Secondary growth: Of plants occur due to activity of cambium and it results increase in girth of plant.
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12th Class Biology Chapter 19 Short Questions

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