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 891: Nitrifying bacteria keep the soil fertile by Options:
  A) converting nitrate to nitrogen
  B) converting ammonium salt to nitrate
  C) converting atmospheric nitrogen to plant nitrogen
  D) converting nitrate to nitrous oxide
  E) converting atmospheric nitrogen to nitrates
  Show Answer
  The correct answer is B .
• Question 892:

  

  Which of the labelled parts will develop into a new maize plant?

  Options:
  A) 2
  B) 3
  C) 4
  D) 5
  Show Answer
  The correct answer is B .
• Question 893: A student trying to find out the order in which organisms appear on a cleared plot is studying one of the following Options:
  A) Ecosystem
  B) Food chain
  C) Food web
  D) Succession
  E) Community
  Show Answer
  The correct answer is D .
• Question 894: Erythrocytes are known as ________ Options:
  A) white blood cell
  B) red blood cells
  C) phagocytes
  D) leucocytes
  Show Answer
  The correct answer is B .
• Question 895: Rodents gnaw on food with their Options:
  A) molar teeth
  B) strong jaws
  C) flat-ridged teeth
  D) chisel - like front teeth
  Show Answer
  The correct answer is D .
• Question 896:

  

  The corolla is partly represented by

  Options:
  A) I
  B) II
  C) III
  D) Iv
  Show Answer
  The correct answer is A .
• Question 897: The average number of individuals of a species per unit area of the habitat is the Options:
  A) population density
  B) population frequency
  C) population size
  D) population distribution
  Show Answer
  The correct answer is A .
• Question 898: The organ located within the duodenal loop in the mamal is the Options:
  A) spleen
  B) pancreas
  C) liver
  D) gall bladder
  Show Answer
  The correct answer is B .
• Question 899:

  What is the function of trichocyst in paramecium?

  Options:
  A) Movement
  B) Defence
  C) Excretion
  D) At which stage in this cycle can man b infected
  Show Answer
  The correct answer is B .
• Question 900: The modes of nutrition in Nitrobacter, Ascaris and Homo sapiens respectively are Options:
  A) photosynthetic , parasitic and holozoic
  B) chemosynthetic, parasitic and holozoic
  C) photosynthetic, parasitic and heterophytic
  D) chemosynthetic, holophytic and holozoic
  Show Answer
  The correct answer is B .