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 641: The organisms with the least number of individuals in a pyramid of numbers are the Options:
  A) secondary consumers
  B) tertiary consumers
  C) primary producers
  D) primary consumers
  Show Answer
  The correct answer is B .
• Question 642: Free nitrogen is released to the atmosphere by Options:
  A) Nitrogen-fixing bacteria
  B) nitrifying bacteria
  C) denitrifying bacteria
  D) saprophytic bacteria
  Show Answer
  The correct answer is C .
• Question 643:

  The correct pathway for blood flow from the heart to the tissues of mammals is?

  Options:
  A) heart-arteriole-artery-tissues
  B) heart-artery-arteriole-tissues
  C) heart-vein-venule-tissues
  D) heart-venule-vein-tissues
  Show Answer
  The correct answer is B .
• Question 644:

  Which of the following is the most inclusive level of classification in the Linnaean system?

  Options:
  A) Kingdom
  B) Domain
  C) Class
  D) Phylum
  Show Answer
  The correct answer is A .
• Question 645:

  An organism which exhibit extracellular digestion is

  Options:
  A) Spirogyra
  B) Paramecium
  C) Amoeba
  D) Rhizopus
  Show Answer
  The correct answer is D .
• Question 646:

  

  The type of germination illustrated is termed

  Options:
  A) hypogeal
  B) epicotyl
  C) epigeal
  D) hypocotyl
  Show Answer
  The correct answer is C .
• Question 647: Which of these is not an enzyme? Options:
  A) Pepsin
  B) Gastrin
  C) Amylase
  D) Chymotrypsin
  E) Trypsin
  Show Answer
  The correct answer is B .
• Question 648: Hypogeal germination is characterized by the Options:
  A) emergency of the plumule out of the ground
  B) provision of nourishment by the endosperm
  C) elongation of the hypocotyl
  D) elongation of the epicotyl
  Show Answer
  The correct answer is D .
• Question 649:

  

  In the diagram, the part labelled IV indicated that the yeast population has

  Options:
  A) reached its maximum size
  B) reached senescence
  C) stopped metabolizing food
  D) started dying
  Show Answer
  The correct answer is A .
• Question 650: When two heterozygotes mate, the dominant trait will appear in Options:
  A) the F₁ generation only
  B) the F₂ generation only
  C) both the F₁ and F₂ generations
  D) neither the F₁ nor F₂ generation
  Show Answer
  The correct answer is C .