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 721: Osmic acid boiled with a solution of food substance gave a black precipitate. This indicates the presence of Options:
  A) fats and oil
  B) proteins
  C) amino acids
  D) starch
  Show Answer
  The correct answer is A .
• Question 722: A tall plants crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents? Options:
  A) TT, TT
  B) Tt, tt
  C) TT, tt
  D) Tt, Tt
  Show Answer
  The correct answer is B .
• Question 723: The following are examples of oviparous animals except Options:
  A) crocodile
  B) dove
  C) rat
  D) tilapia
  Show Answer
  The correct answer is C .
• Question 724: Which of these groups of animals is likely to be found in fresh water? Options:
  A) Blood worm, pond skater and scorpion
  B) Blood worm, pond skater and dragonfly larva
  C) pond skater, scropion and dragonfly larva
  D) Pond skater, blood worm and ant-lion
  Show Answer
  The correct answer is B .
• Question 725: A unique characteristics of the cervical vertebrate is the presence of Options:
  A) large centrum
  B) long transverse processes
  C) zgapophysis
  D) vertebrartarial canal
  Show Answer
  The correct answer is D .
• Question 726: How does an enzyme affect the rate of a reaction? Options:
  A) It lowers the activation energy of the reaction, increasing the reaction rate.
  B) It raises the activation energy of the reaction, decreasing the reaction rate.
  C) It lowers the activation energy of the reaction, decreasing the reaction rate.
  D) It raises the activation energy of the reaction, increasing the reaction rate.
  Show Answer
  The correct answer is A .
• Question 727:

  When a colour blind woman marries a normal man, what is the probability of their son being colour blind?

  Options:
  A) 25%
  B) 100%
  C) 50%
  D) 0%
  Show Answer
  The correct answer is B .
• Question 728: The sensory cell that responds to dim light is referred to as the Options:
  A) cone
  B) lens
  C) rod
  D) iris
  Show Answer
  The correct answer is C .
• Question 729: The structure that is common in the embryos of mammals, amphibians, birds, fishes and reptiles and which is an evidence of their common ancestry is the Options:
  A) eye
  B) chorion
  C) allantois
  D) gill-silts
  Show Answer
  The correct answer is D .
• Question 730: The habitat of the cysticercus of taenia solium is Options:
  A) Alimentary canal of cattle
  B) Muscles of pig
  C) Alimentary canal of pig
  D) Muscles of cattle
  Show Answer
  The correct answer is B .