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 271: The substance that is responsible for optical dominance in plants is known as Options:
  A) gibberellin
  B) tannin
  C) auxin
  D) kinin
  Show Answer
  The correct answer is C .
• Question 272:

  Which of the following describes the inheritance of traits from parents to offspring

  Options:
  A) Evolution
  B) Adaptation
  C) Genetics
  D) Natural selection
  Show Answer
  The correct answer is C .
• Question 273: The type of reproduction that is common to both Hydra and yeast Options:
  A) conjugation
  B) binary fission
  C) grafting
  D) budding
  Show Answer
  The correct answer is D .
• Question 274:

  The vitamin which is important in the formation of the retina pigment is

  Options:
  A) Vitamin A
  B) Vitamin B
  C) Vitamin C
  D) Vitamin D
  Show Answer
  The correct answer is A .
• Question 275: A density-dependent factor that regulates the population size of organism is Options:
  A) Disease
  B) Sudden flood
  C) Drought
  D) Fire outbreak
  Show Answer
  The correct answer is A .
• Question 276: If the cross of a red-flowered plant with a white-flowered plant produces a pink-flowered plant, it is an example of Options:
  A) codominance
  B) incomplete dominance
  C) mutation
  D) linkage
  Show Answer
  The correct answer is B .
• Question 277: When the original king and queen of termites die, they are replaced by Options:
  A) the king and queen of another colony
  B) some adult reproductives from the same colony
  C) some adult workers which are specially fed breed
  D) developing nymphs nurtured as secondary reproductives
  Show Answer
  The correct answer is B .
• Question 278:

  A freshwater plant such as water lily can solve the problem of buoyancy by the possession of?

  Options:
  A) aerenchyma tissues
  B) dissected leaves
  C) thin cell walls of the epidermis
  D) water-repelling epidermis
  Show Answer
  The correct answer is A .
• Question 279:

  Which of the following is NOT regarded as a pollutanton land or in the air?

  Options:
  A) Smoke
  B) Nitrogen
  C) Noise
  D) Sulphur dioxide
  Show Answer
  The correct answer is B .
• Question 280: Pepsin is a digestive enzymes which breaks Options:
  A) Cellulose into glucose molecules
  B) Carbohydrates into simple sugars
  C) Protein into peptones
  D) Fats into glycerol and fatty acid
  E) Sucrose into glucose and fructose
  Show Answer
  The correct answer is C .