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 561: The ratio of carriers to sicklers in the F₁ generation derived from a parental cross of two carriers of haemoglobin S gene is Options:
  A) 3 : 1
  B) 1 : 3
  C) 2 : 1
  D) 1 : 2
  Show Answer
  The correct answer is C .
• Question 562: In the Burret test, some protein was mixed with sodium hydroxide solution. Which of the following chemicals should be added to the mixture for a positive results? Options:
  A) Mercurous nitrates
  B) Copper sulphate
  C) Mercuric nitrate
  D) Sodium carbonate
  E) Ammonium hydroxide
  Show Answer
  The correct answer is B .
• Question 563: The part of the mammalian ear responsible for the maintenance of balance is the Options:
  A) cochlea
  B) pinna
  C) perilymph
  D) vestibular system
  Show Answer
  The correct answer is D .
• Question 564: Birds maintain their body temperature with the help of their Options:
  A) blood which maintains constant temperature
  B) feathers which cover the body
  C) skin which conserves moisture
  D) veins which transport fluid of constant temperature to all body tissues
  Show Answer
  The correct answer is B .
• Question 565: An hormoiothermic animal kept in a room where the temperature is lower than the body temperature may lose heat by four physical process. Which of the following processes is NOT connected with the body temperature regulation ? Options:
  A) Radiation
  B) Sweat
  C) Evaporation
  D) Conduction
  E) Convection
  Show Answer
  The correct answer is E .
• Question 566: Short-sightedness can be corrected by lenses which are Options:
  A) convex
  B) biconvex
  C) plano-convex
  D) concave
  Show Answer
  The correct answer is D .
• Question 567: Gestation in mammals is the period Options:
  A) required for growth after birth
  B) between the formation of the foetus and birth
  C) of development from zygote to birth
  D) before the formation of the zygote
  Show Answer
  The correct answer is B .
• Question 568:

  Which type of reproduction involves the fusion of gametes from two parents?

  Options:
  A) Sexual reproduction
  B) Asexual reproduction
  C) Binary fission
  D) Budding
  Show Answer
  The correct answer is A .
• Question 569: If a nursing mother is not producing enough milk, her hormonal system is probably deficient in Options:
  A) prolactin
  B) testosterone
  C) thyroxin
  D) insulin
  Show Answer
  The correct answer is A .
• Question 570: Spines and shells on animals are adaptation for Options:
  A) camouglage
  B) chemical defence
  C) physical defence
  D) mimicry
  Show Answer
  The correct answer is C .