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 81: Erosion can be reduced along shape by Options:
  A) ridging across slope
  B) ridging up slope
  C) ridging down slope
  D) crop rotation
  E) bush fallowing system
  Show Answer
  The correct answer is A .
• Question 82: A mixture of mercurous and mercuric nitrates is added to a food substance. A white precipitates is formed which on gentle heating turns red. The food substance is Options:
  A) Protein
  B) Oil
  C) Carbohydrates
  D) Fat
  E) Fatty acid
  Show Answer
  The correct answer is A .
• Question 83: Denitrifying bacteria in nature liberate gaseous nitrogen directly from Options:
  A) ammonium salts
  B) soil nitrates
  C) thunderstorms
  D) soil nitrites
  E) plant and animal proteins
  Show Answer
  The correct answer is B .
• Question 84: Epigeal germination of a seed is characterized by Options:
  A) more rapid elongation of the hypocotyl than the epicotyl
  B) more rapid elongation of the epicotyl than the hypocotyl
  C) equal growth of both the hypocotyl and epicotyl
  D) lack of growth of the hypocotyl
  Show Answer
  The correct answer is A .
• Question 85: Which one of the following animals is NEVER a secondary host of tapeworms? Options:
  A) cow
  B) Fish
  C) Pig
  D) Man
  E) Dog
  Show Answer
  The correct answer is D .
• Question 86:

  Which of the following structures in the ear is responsible for transmitting sound vibrations to the auditory nerve?

  Options:
  A) Eardrum
  B) Ossicles
  C) Cochlea
  D) Auditory canal
  Show Answer
  The correct answer is C .
• Question 87: Cold blooded animals are referred to as Options:
  A) poikilothermic
  B) homothermic
  C) polythermic
  D) homeostatic
  Show Answer
  The correct answer is A .
• Question 88: The transition from amphibians to mammals involves the limb becoming arranged to support the weight more effectively requiring modifications in the Options:
  A) collar bones and coccyx
  B) pectoral and pelvic girdles
  C) scapulae and clavicles
  D) vertebrae and sternum
  Show Answer
  The correct answer is B .
• Question 89: Fossil records found in sedimentary rocks offer some explanation for the theory of evolution because Options:
  A) the deposits have remains of organisms characteristic of when they were formed
  B) different strata have remains of organisms of the same kind
  C) only organisms with strong parts are fossilized
  D) most animal and plant fossils bear little resemblance to present day living specimens
  Show Answer
  The correct answer is A .
• Question 90: During mammalian embryo development, large amounts of oestrogen and progesterone are produced in the Options:
  A) umbilical cord
  B) amnion
  C) placenta
  D) amniotic fluid
  Show Answer
  The correct answer is C .