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 1101: 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 1102: The carnassial teeth of a carnivorous animal consist of the Options:
  A) last upper premolar and the first lower molar
  B) last upper molar and the last lower molar
  C) first upper premolar and the lower molar
  D) first upper molar and the first lower molar
  Show Answer
  The correct answer is A .
• Question 1103:

  Which of the following substances has the highest amount of energy in joules per unit weight?

  Options:
  A) Carbohydrates
  B) Fats
  C) Proteins
  D) Vitamins
  Show Answer
  The correct answer is B .
• Question 1104:

  The overall reaction in glycolysis can be summarised as

  Options:
  A) C${}_6$H${}_{12}$O${}_6$ -----> C${}_3$H${}_4$O${}_3$ + 4H + ATP
  B) C${}_6$H${}_{12}$O${}_6$ -----> 2C${}_3$H${}_4$O${}_3$ + 4H + 2ATP
  C) C${}_6$H${}_{12}$O${}_6$ -----> 2C${}_3$H${}_4$O${}_3$ + 4H + ADP
  D) C${}_6$H${}_{12}$O${}_6$ -----> 2C${}_3$H${}_4$O${}_3$ + 4H + 2ADP
  Show Answer
  The correct answer is B .
• Question 1105: One advantage of variation in a species population is that individuals Options:
  A) with favoured traits become dominant
  B) easily reach their reproductive age
  C) are easily recognised by mates
  D) are better adapted to changes
  Show Answer
  The correct answer is A .
• Question 1106: The short thick break in birds is an adaptation for Options:
  A) crushing seeds
  B) sucking nectar
  C) tearing flash
  D) straining mud
  Show Answer
  The correct answer is A .
• Question 1107: A biotic factor which affects the distribution and abundance of organisms in a terrestrial habitat is Options:
  A) temperature
  B) competition
  C) pH
  D) light
  Show Answer
  The correct answer is B .
• Question 1108: The correct sequence of the movement of urea during urine formation is Options:
  A) glomerulus → Bowman's capsule→ Convoluted tubules → Henle's loop → collection tube
  B) glomerulus → Bowman''s capsule→ Convoluted tubules → Henle's loop → convoluted tubule→ collecting tubule
  C) convoluted tubules → glomerulus → Henle's loop→ Bowman's capsule →collecting tubules
  D) convoluted tubule → Bowman's capsule → Henle's loop →glomerulus → collecting tubule
  Show Answer
  The correct answer is A .
• Question 1109:

  The study of an individual organism or a single species of organism and its environment is

  Options:
  A) Artecology
  B) Ecological concepts
  C) Synecoloy
  D) Biotic composers
  Show Answer
  The correct answer is A .
• Question 1110: The stem differs from the root in having the xylem and phloem strands Options:
  A) on the same radii
  B) scattered
  C) on alternate radii
  D) towards the pith
  Show Answer
  The correct answer is A .