Biology Exam Past Questions and Answers | JAMB, WAEC and NECO

Biology is the study of life and living things. It can be divided into different areas that look at the structure, function, anatomy, and behavior of organisms.

• Question 321: If X^N is the dominant allele for normal vision and Xⁿ the recessive allele for colour blindness, a boy with the genotype YXⁿ will be Options:
  A) have normal vision
  B) be colour-blind
  C) be totally blind
  D) be a carrier of colour blindness
  Show Answer
  The correct answer is B .
• Question 322: Which of the following will not allow osmosis to take place Options:
  A) pig's bladder
  B) cellophane
  C) parchment paper
  D) transparent polythene
  E) cow's bladder
  Show Answer
  The correct answer is D .
• Question 323: Starting from the skull end the vertebrate are arranged in the following order Options:
  A) axis, atlas, cervical, thoracic and lumber
  B) atls, cervical, axis, thoracic and lumber
  C) atlas, axis, thoracic, cervical and lumber
  D) atlas, axis, cervical, thoracic and lumber
  E) atlas, thoracic, cervical, axis and lumber
  Show Answer
  The correct answer is D .
• Question 324: The long and coiled intestine of a young tadpole ia an adaptation to its Options:
  A) herbivorious diet
  B) carnivororus diet
  C) aquatic habitat
  D) insectivorous habit
  Show Answer
  The correct answer is A .
• Question 325: In a saprophyte, sex organs are produced in the Options:
  A) Gamotrophyte
  B) Rhizoid
  C) Protonema
  D) Sporopyte
  Show Answer
  The correct answer is C .
• Question 326: A centipede differs from a millipede by its Options:
  A) colour
  B) numerous abdominal segment
  C) paired legs on each abdominal segment
  D) poison claws
  E) cylindrical body
  Show Answer
  The correct answer is D .
• Question 327:

  Which of the following statements best describes courtship behaviors in animals?

  Options:
  A) Courtship behaviors are solely performed by males to establish dominance within a social group
  B) Courtship behaviors involve displays and rituals performed by both males and females to attract a mate
  C) Courtship behaviors are primarily performed by females to attract males for mating
  D) Courtship behaviors are aggressive interactions between males competing for a female mate
  Show Answer
  The correct answer is B .
• Question 328: The structural adaptation of desert plants for water conservation is Options:
  A) broad leaves with numerous stomata
  B) spongy mesophyll
  C) spiny leaves
  D) prominent stomata in leaves
  Show Answer
  The correct answer is C .
• Question 329: One of the following is called emergency hormone in man. Options:
  A) Adrenalin
  B) Prolactin
  C) Testosterone
  D) Thyroxine
  Show Answer
  The correct answer is A .
• Question 330: The substance that is responsible for optical dominance in plants is known as Options:
  A) gibberellin
  B) tannin
  C) auxin
  D) kinin
  Show Answer
  The correct answer is C .