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 21: One of adaptation of Cactus opuntia to conserve water is the reduction of Options:
  A) internodes
  B) stem to leaves
  C) leaves to spine
  D) flower size
  Show Answer
  The correct answer is C .
• Question 22:

  An adaptive feature of camel to the desert is?

  Options:
  A) ability to increase sweat production
  B) ability to pass high amount of urine
  C) ability to tolerate low degree of dehydration
  D) ability to tolerate high degree of dehydration
  Show Answer
  The correct answer is D .
• Question 23: A yellow maize is planted and all the fruits obtained are of yellow seeds. When they are croos-bred, yellow seeds and white seeds are obtained in a ratio 3:1 . The yellow seed is said to be Options:
  A) non-heritable
  B) sex-linked
  C) a recessive trait
  D) a dominant trait
  Show Answer
  The correct answer is D .
• Question 24: Which of the following groups of invertebrates reproduces by budding? Options:
  A) Arthropoda
  B) Annelides
  C) Mollusces
  D) Coelenterata
  Show Answer
  The correct answer is D .
• Question 25: Which of the following plant hormone is responsible for ripening of fruits? Options:
  A) Gibberellins
  B) Abscisic acid
  C) Ethylene
  D) Cytokinins
  Show Answer
  The correct answer is C .
• Question 26:

  Which of the following organs can be considered vestigial in humans but functional in other mammals

  Options:
  A) The liver
  B) Appendix
  C) Rectum
  D) Stomach
  Show Answer
  The correct answer is B .
• Question 27:

  Which of the following is an example of a microorganism in action as a disease vector?

  Options:
  A) Fungi decomposing dead plant material
  B) Mosquito transmitting malaria
  C) Bacteria causing food poisoning
  D) Algae producing oxygen through photosynthesis
  Show Answer
  The correct answer is B .
• Question 28:
  

  Use the diagram above to answer this question. Arrows represent directional movement materials.

  The arrow labelled ll represents the

  Options:
  A) release of oxygen
  B) intake of carbon (IV) oxide
  C) movement of photosynthates
  D) movement of nutrients
  Show Answer
  The correct answer is A .
• Question 29:

  

  In the diagram, the organelle responsible for heredity is

  Options:
  A) iii
  B) iv
  C) ii
  D) i
  Show Answer
  The correct answer is A .
• Question 30:

  

  In the diagram, the function of the correcting lens is to

  Options:
  A) diverge incoming rays
  B) converge incoming rays
  C) reflect incoming rays
  D) screen incoming rays
  Show Answer
  The correct answer is B .