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Tuesday, 10 November 2026
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Biology Past Questions and Answers

Waec Biology Questions

Question 831:
The endocrine gland secreting hormone that induces the thyroid gland to produce more thyroxine is
  • A Islets of Langerhans
  • B Adrenal gland
  • C Pituitary gland
  • D Parathyroid gland
View Answer & Explanation
Question 832:
The part of the nervous system that interprets blinking of the eye is the
  • A Spinal cord
  • B Cerebrum
  • C Hind brain
  • D Olfactory lobe
View Answer & Explanation
Question 833:
Which of the following is the function of the iris of the mammalian eye?
  • A Closes and opens the eye
  • B Absorbs dangerous rays from sunlight
  • C Regulates the amount of light entering the eye
  • D Bringing light rays to focus on the retina
View Answer & Explanation
Question 834:
The layer of light-sensitive cells in the human eye is called the
  • A Cornea
  • B Sclerotic layer
  • C Retina
  • D Conjunctiva
View Answer & Explanation
Question 835:
Placentation of plants is best described as the
  • A Arrangement of ovules in the ovary
  • B Arrangement of fruits on the branches
  • C Development of ovules in the ovary
  • D Formation of the pericarp from the ovary wall
View Answer & Explanation