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

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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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

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 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

Give role of temperature in plant growth.

  • Ans 1: Temperature influences the growth within a certain range (0-35oC). Normally rate of growth increase with rise of temperature and decrease with decrease in temperature. For maximum growth the optimum temperature is 25-35oC 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 4

Question # 1

Explain embryonic induction.

  • Ans 1: Capacity of some cells to induce a specific developmental response in other cells is wide spread phenomena,this is called embryonic induction.
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12th Class Biology Chapter 19 Short Questions

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