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 2081: White blood cells are also known as Options:
  A) erythrocytes
  B) leucocytes
  C) lymphocytes
  D) phagocytes
  Show Answer
  The correct answer is B .
• Question 2082: Two organisms of different species, living in close association but not dependent on each other are referred to as Options:
  A) parasites
  B) commensals
  C) symbionts
  D) autotrophs
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  The correct answer is D .
• Question 2083: 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 2084: 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 2085: Anaerobic respiration differs from aerobic respiration by the production of Options:
  A) less amount of energy and water
  B) greater amount of energy and alcohol
  C) less amount of energy and alcohol
  D) greater amount of energy and water
  Show Answer
  The correct answer is C .
• Question 2086: To facilitate gaseous exchange, breathing roots have Options:
  A) stomata
  B) mitochondria
  C) cuticle
  D) lenticels
  Show Answer
  The correct answer is D .
• Question 2087: Choose the sequence which represents the correct order of organisms in a food chain. Options:
  A) Grass, snake, toad, grasshopper, hawk
  B) Grass, grasshopper, toad, snake, hawk
  C) Grass, grasshopper, snake, toad, hawk
  D) Grass, snake, grasshopper, toad, hawk
  E) Grass, toad, snake, grasshopper, hawk
  Show Answer
  The correct answer is B .
• Question 2088: Evidence that a tooth is a living part of the mammalian can be found within the Options:
  A) gum
  B) pulp cavity
  C) cement
  D) enarmel
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  The correct answer is B .
• Question 2089: 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 2090:

  

  The structure labelled 5 is the

  Options:
  A) nucleolus
  B) Golgi body
  C) mitochondrion
  D) vacuole
  Show Answer
  The correct answer is B .