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 121:

  

  Use the diagram above to answer this question.

  Water reabsorption takes place in

  Options:
  A) ll and lll
  B) lll and lV
  C) l and IV
  D) l and lll
  Show Answer
  The correct answer is B .
• Question 122: i. Growth is mainly apical ii. Growth is specific with definite shape iii. Growth is throughout life. Which of the above correctly describes the growth pattern in plants? Options:
  A) i, ii and iii only
  B) ii and iii only
  C) i and ii only
  D) i and iii only
  Show Answer
  The correct answer is D .
• Question 123: Which of the following groups of environmental factors are density-dependent? Options:
  A) Food, salinity, accumulation of matabolites and light
  B) Temperature, salinity predation and disease
  C) Food predation, disease and accumulation of metabolites
  D) Temperature food disease and light
  Show Answer
  The correct answer is C .
• Question 124: How does an enzyme affect the rate of a reaction? Options:
  A) It lowers the activation energy of the reaction, increasing the reaction rate.
  B) It raises the activation energy of the reaction, decreasing the reaction rate.
  C) It lowers the activation energy of the reaction, decreasing the reaction rate.
  D) It raises the activation energy of the reaction, increasing the reaction rate.
  Show Answer
  The correct answer is A .
• Question 125:

  When a cell is placed in solution and the size of the cell increases, the concentration of solution is said to be

  Options:
  A) isotonic
  B) dilute
  C) hypotonic
  D) hypertonic
  Show Answer
  The correct answer is C .
• Question 126:

  Which of the following are components of glomerular filtrate?

  Options:
  A) All the components of blood except mineral salts
  B) Water and salt only
  C) All the components of blood except plasma protein and cells
  D) Blood cells, amino acid, salts and nitrogenous wastes
  Show Answer
  The correct answer is C .
• Question 127: Roots of plants are normally Options:
  A) Positively phototropic
  B) Negatively geotropic
  C) Negatively hydrotropic
  D) Positively hydrotropic
  E) Negatively chemotropic
  Show Answer
  The correct answer is D .
• Question 128: The significance of a very large number of termites involved in nuptial swarming is to Options:
  A) provide birds with plenty of food
  B) ensure their perpetuation despite predatory pressure
  C) search for a favourable place to breed
  D) ensure that every individual gets a mate
  Show Answer
  The correct answer is B .
• Question 129:

  Which of the following is a primary source of pollution in aquatic ecosystems?

  Options:
  A) Soil erosion
  B) Industrial discharge
  C) Air pollution
  D) Deforestation
  Show Answer
  The correct answer is B .
• Question 130:

  

  The bone labelled X in the figure above is the

  Options:
  A) ulna
  B) fibula
  C) radius
  D) humerus
  E) tibia
  Show Answer
  The correct answer is D .