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 61: The pathogen that cause smallpox is Options:
  A) picornavirus
  B) peramyxovirus
  C) herpesvirus
  D) poxvirus
  Show Answer
  The correct answer is D .
• Question 62: Mycorriza is an associationn between fungi and Options:
  A) protozoans
  B) Roots of higher plants
  C) Bacteria
  D) Filamentous algae
  Show Answer
  The correct answer is B .
• Question 63: Hermophroditic reproduction can be found among the Options:
  A) Arthropods and nematodes
  B) Pisces and amphibians
  C) Annelids and molluscs
  D) coelenterates and platyhelminthes
  Show Answer
  The correct answer is D .
• Question 64: The movement of plant in response to external stimulus of no particular direction is Options:
  A) taxism
  B) tropism
  C) hyptotropic movement
  D) nastic movement
  E) phototropism
  Show Answer
  The correct answer is D .
• Question 65: The opening of the stoma is controlled by the Options:
  A) presence of a pore
  B) increase in solute concentration in the guard cells
  C) presence of guard cells
  D) decrease in solute concentration in the guard cells
  Show Answer
  The correct answer is B .
• Question 66:

  The greatest influence on a stable ecosystem in nature is exerted by

  Options:
  A) man
  B) pollution
  C) animals
  D) rainfall
  Show Answer
  The correct answer is A .
• Question 67: In nature, plants and animals are perpetually engaged in mutualism because Options:
  A) they are rivals
  B) all animals rely on food produced by plants
  C) they utilize respiratory wastes of each other
  D) they are neighbours
  Show Answer
  The correct answer is B .
• Question 68: The lowest unit of classification is the Options:
  A) class
  B) genus
  C) phylum
  D) species
  Show Answer
  The correct answer is D .
• Question 69: In the nitrogen cycle, the nitrates in the soil are converted to atmospheric nitrogen by Options:
  A) puterfying bacteria
  B) nitrogen-fixing bacteria
  C) nitrifying bacteria
  D) denitrifying bacteria
  Show Answer
  The correct answer is D .
• Question 70:

  Which of the following factors primarily affects the distribution of organisms in an ecosystem

  Options:
  A) Wind speed
  B) Soil pH
  C) Temperature
  D) Day length
  Show Answer
  The correct answer is C .