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 1041:

  

  Melanin and keratin are produced in the part labelled

  Options:
  A) 2
  B) 3
  C) 4
  D) 5
  Show Answer
  The correct answer is A .
• Question 1042: Which scenario would cause a covalent bond to form? Options:
  A) Two atoms share electrons so they can fill their outer shells
  B) The constant motion of electrons and the creation of charge imbalances bonds two molecules together
  C) A hydrogen atom with a slight positive charge is attracted to a negative charge of another molecule or atom
  D) One atom loses one or more electrons and the other atom gains one or more electrons
  Show Answer
  The correct answer is A .
• Question 1043: Water is necessary for a germinating seed because it Options:
  A) promotes aerobic respiration
  B) activate the enzymes
  C) wets the soil for proper germination
  D) protects the seed from disiccation
  Show Answer
  The correct answer is B .
• Question 1044: When yeast respire anaerobically, it converts simple sugar to carbon (IV) oxide and Options:
  A) oxygen
  B) acid
  C) alcohol
  D) water
  Show Answer
  The correct answer is C .
• Question 1045:

  The sum total of adaptive changes from pre-existing form that have taken place over a long time resulting in diversity of forms, structures and functions among organism is referred to as

  Options:
  A) Specification
  B) Inorganic Evolution
  C) Evolution
  D) Organic Evolution
  Show Answer
  The correct answer is D .
• Question 1046: The path followed by air as it passes through the lungs in mammals is Options:
  A) trachea → bronchi → bronchioles → alveoli
  B) bronchi → trachea → alveoli → bronchioles
  C) trachea → bronchioles → alveoli
  D) bronchioles → alveoli → bronchi →trachea
  Show Answer
  The correct answer is A .
• Question 1047: The deficiency of vitamin D leads to Options:
  A) beriberi
  B) pellagra
  C) ricket
  D) scurvy
  Show Answer
  The correct answer is C .
• Question 1048: Accommodation of the human eye is best described as the Options:
  A) ability to see distant objects
  B) movement of upper and lower eyelids
  C) focusing of near and distant objects
  D) changing of lens shape due to varying light intensities
  E) constant adjustment of the iris
  Show Answer
  The correct answer is C .
• Question 1049: Which of the ways of controlling bilharzia can result in pollution? Options:
  A) clearing water weeds on which the snail feed
  B) Treating infected people with drugs
  C) Preventing contamination of water by infected urine and faeces
  D) Applying chemical to kill the snails
  Show Answer
  The correct answer is D .
• Question 1050: Carbon (IV) oxide content of the atmosphere is least affected by Options:
  A) cutting down and clearing of forests
  B) forest fires
  C) burning of fossil fuels
  D) plant and animal respiration
  Show Answer
  The correct answer is A .