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 891: Which of these products obtained from analyzing sweat from skin is not an excretory product? Options:
  A) water
  B) Salts
  C) Dust
  D) Urea
  E) Urates
  Show Answer
  The correct answer is C .
• Question 892: The least adaptive feature of aboreal life is the Options:
  A) possession of fouur limbs
  B) possession of claws
  C) development of long tail
  D) shading of coat colour
  Show Answer
  The correct answer is D .
• Question 893: Atmospheric nitrogen is converted to soil nitrogen for plant use by Options:
  A) nitrification and combustion
  B) putrefaction and lightning
  C) lightning and nitrification
  D) combustion and putrefaction
  Show Answer
  The correct answer is B .
• Question 894:

  What is the critical limiting factor for plants below the photic zone in an aquatic ecosystem?

  Options:
  A) availability of nutrients
  B) availability of water
  C) intensity of light
  D) carbon dioxide concentration
  Show Answer
  The correct answer is C .
• Question 895:

  The most important plant hormone is

  Options:
  A) cytokinin
  B) abscisic acid
  C) auxin
  D) gibberellin
  Show Answer
  The correct answer is C .
• Question 896:

  

  The structure labelled 5 is the

  Options:
  A) sweat gland
  B) sebaceous gland
  C) blood vessel
  D) nerve fibre
  Show Answer
  The correct answer is A .
• Question 897: Which of the following is NOT a function of mammalian blood? Options:
  A) Engulfing bacteria
  B) Production of hormones
  C) Transporting ureas
  D) Distribution of heat
  E) Transporting glucose
  Show Answer
  The correct answer is B .
• Question 898: The part of the mammalian brain responsible for maintaining balance is the Options:
  A) medulla oblongata
  B) olfactory lobe
  C) cerebellum
  D) cerebrum
  E) frontal lobe
  Show Answer
  The correct answer is C .
• Question 899: Sources of air pollutants are Options:
  A) industrial chimneys, burning fossil oils and river dam
  B) sulphur dioxide, acid rain and pesticides
  C) sulphur mines, vehicle exhausts and aerosols
  D) sewage, smoke and old vehicle
  Show Answer
  The correct answer is C .
• Question 900:

  

  Which of the following results is to be expected if the set up is left for several hours?

  Options:
  A) decrease in the size of the yam
  B) movement of the salt solution into the water
  C) decrease in the volume of water inside the yam
  D) movement of water from the salt solution into the yam
  Show Answer
  The correct answer is C .