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 281: The importance of the mouth-brooding behaviour in Tilapia is that it Options:
  A) helps in keeping the young fish warm
  B) affords protection from predation for the young fish
  C) helps the fish to live in a social group
  D) provides regurgitated nourishment to the young fish
  Show Answer
  The correct answer is B .
• Question 282: Which of the following is NOT a function of the liver? Options:
  A) Regulation of blood sugar
  B) Storage of iron
  C) Formation of bile
  D) Breakdown of excess amino acids
  E) Excretion of urea from the blood
  Show Answer
  The correct answer is E .
• Question 283: The stunted growth of a leguminous plant suffering from nitrogen deficiency may be corrected by inoculating the soil with Options:
  A) denitrifying bacteria
  B) Saprophytic bacteria
  C) Rhizobium
  D) Nitrosomonas
  Show Answer
  The correct answer is C .
• Question 284: The structure that is most commonly identified in all living cells under the light microscope is the Options:
  A) mitochondrion
  B) chloroplast
  C) nucleus
  D) ribosome
  Show Answer
  The correct answer is C .
• Question 285:

  

  The type of joint at the point labelled 5 is the

  Options:
  A) pivot joint
  B) gliding joint
  C) ball and socket joint
  D) hinge joint
  Show Answer
  The correct answer is D .
• Question 286:

  In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained

  Weight of the evaporating basin alone = 80.5g

  Weight of basin and soil = 101.5g

  Weight after drying the soil in the oven = 99.0g

  Weight of basin and roasted soil = 95.5g

  The percentage of humus in the soil sample is

  Options:
  A) 16.7%
  B) 17.6%
  C) 26.7%
  D) 16.2%
  Show Answer
  The correct answer is A .
• Question 287: Which of the following statement is NOT true of symbiosis? Options:
  A) Symbionts must be living
  B) It is an association of 'give and take'
  C) The association may involve two plants
  D) Association between two similar species
  E) Symbionts derive mutual benefit
  Show Answer
  The correct answer is D .
• Question 288:

  The body of a snail is divided into head?

  Options:
  A) thorax and abdomen
  B) visceral mass and abdomen
  C) thorax and foot
  D) visceral mass and foot
  Show Answer
  The correct answer is D .
• Question 289: The absence of stomata shows that a leaf may be Options:
  A) from a floating plant
  B) from submerged plant
  C) varigated
  D) from a terrestrial plant
  E) from parasitic green plant
  Show Answer
  The correct answer is B .
• Question 290: After one week of life, the weight of five chicks of the same sex hatched simultaneously from the eggs of the same hen and fed on the same diet were 45g, 40g, 35g, 33g and 30g. This is an example of Options:
  A) growth rate
  B) natural selection
  C) variation
  D) mutation
  Show Answer
  The correct answer is C .