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 761: Which of the following is not a pest of crops? Options:
  A) Bird
  B) Rodent
  C) Bed bug
  D) Grasshopper
  Show Answer
  The correct answer is C .
• Question 762:

  The insect trapping movements of the leaves of the venus fly trap is a behavioural adaptation for

  Options:
  A) support
  B) surviving adverse weather conditions
  C) obtaining food
  D) dormancy
  Show Answer
  The correct answer is C .
• Question 763: In spite of the removal of carbondioxide from the atmosphere, its amount remains more or less constant because Options:
  A) it is produced by green plants during photosynthesis
  B) it is produced during respiration of animals
  C) it is absorbed inn ocean water
  D) green plants release it during the day
  Show Answer
  The correct answer is B .
• Question 764:

  Which of the following is associated with the dark stage of photosynthesis?

  Options:
  A) Assimilation of Carbon(IV)oxide
  B) Photophosphorylation
  C) Photolysis
  D) Excitation of chlorophyll
  Show Answer
  The correct answer is A .
• Question 765: 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 766: The arrangement of ovules attached to the sides of a syncarpous ovary with a single chamber is referred to as Options:
  A) free-central placentation
  B) axile placentation
  C) parietal placentation
  D) marginal placentation
  Show Answer
  The correct answer is C .
• Question 767: The following group of plants is the most advanced except Options:
  A) bryophyte
  B) pteridophyta
  C) spermatophyte
  D) thallophytic
  Show Answer
  The correct answer is D .
• Question 768: 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 .
• Question 769:

  

  In the diagram, the part labelled I represents the

  Options:
  A) stationary phase
  B) lag phase
  C) log phase
  D) steady phase
  Show Answer
  The correct answer is B .
• Question 770: Leaching is Options:
  A) Washing away of humus from the soil surface
  B) reducing of soil aeration by pressure
  C) soil erosion by means other than rainfall
  D) loss of organic matter due to exposure to direct sunlight
  E) washing out chalk and limestone from upper layers of by heavy rains
  Show Answer
  The correct answer is A .