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Sunday, 21 June 2026
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Biology Past Questions and Answers

Topic: Internal structure of a flowering plant

Jamb Biology Questions - Internal structure of a flowering plant

Question 26:
Which of the following can bring about the greatest increase in the rate of transpiration?
  • A Increased humidity
  • B Reduced temperature
  • C Reduced wind speed
  • D Reduced humidity
View Answer & Explanation
Question 27:
The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the
  • A Stomata
  • B Lenticels
  • C Air space
  • D Guard cell
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Question 28:
The major site of photosynthesis in the leaf is the
  • A Palisade parenchyma
  • B Mesophyll parenchyma
  • C Upper epidermis
  • D Lower epidermis
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Question 29:
Secondary thickening in dicotyledonous stem is controlled by the
  • A Xylem
  • B Phloem
  • C Cambium
  • D Pericycle
View Answer & Explanation
Question 30:
Which of the following structures is capable of producing more tissues in the stem of a herbaceous flowering plant?
  • A Epidermis
  • B Pericycle
  • C Xylem
  • D Cambium
View Answer & Explanation