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 311: Which is the most important pollutant of the marine environment in Nigeria? Options:
  A) Insecticides
  B) Sewage
  C) Oil
  D) Inorganic fertilizers
  Show Answer
  The correct answer is C .
• Question 312: A phenotypic character with intermediate forms that can be graded from one extreme to the other is referred to as Options:
  A) discontinuous variation
  B) continuous variation
  C) a mutant
  D) a genome
  Show Answer
  The correct answer is B .
• Question 313:

  

  Use the diagram above to answer this question.

  Which of the organisms is characterized by the possession of a chitinous exoskeleton?

  Options:
  A) l
  B) ll
  C) lll
  D) lV
  Show Answer
  The correct answer is A .
• Question 314: The natural process that produces adaptive evolutionary changes is Options:
  A) Mutation
  B) Gene flow
  C) Genetic drift
  D) Natural selection
  Show Answer
  The correct answer is D .
• Question 315: Which of these is NOT an adaptive features for arboreal life? Options:
  A) Possession of long tail
  B) Possession of claws
  C) Possession of teeths
  D) counter shading in coat colour
  Show Answer
  The correct answer is C .
• Question 316: In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results? Options:
  A) Mercurous nitrates
  B) Copper sulphate
  C) Mercuric nitrate
  D) Sodium carbonate
  E) Ammonium hydroxide
  Show Answer
  The correct answer is B .
• Question 317: A pollutant that is mostly associated with acid rain is Options:
  A) Nitrogen (IV) Oxide
  B) Ozone
  C) Fluorine
  D) Carbon (IV) Oxide
  Show Answer
  The correct answer is A .
• Question 318: Stunted growth and poor root development are a result of a deficiency in Options:
  A) sulpur
  B) phosphorus
  C) calcium
  D) iron
  Show Answer
  The correct answer is C .
• Question 319: The part of the mammalian brain responsible for maintaining balance is Options:
  A) Medulla oblongata
  B) Cerebellum
  C) Optic lobe
  D) Cerebrum
  E) Olfactory lobe
  Show Answer
  The correct answer is B .
• Question 320: Growth can best be determined in a population of Spirogyra by measuring the Options:
  A) total length of the filament
  B) total widths of the filaments
  C) rate of photosynthesis in the population
  D) dry weights of the organism
  Show Answer
  The correct answer is A .