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 1751: The organ through which food and oxygen are supplied to the human embryo and which also prevents harmful materials from reaching the embryo is the Options:
  A) amnion
  B) uterus
  C) placenta
  D) umbilical cord
  E) fallopian tube
  Show Answer
  The correct answer is C .
• Question 1752:

  The function of pith in plant is

  Options:
  A) absorb mineral salt and nutrient from the soil
  B) store and transport nutrients throughout the plant
  C) trap chlorophyll from the sunlight
  D) Removal of waste product from the plant
  Show Answer
  The correct answer is B .
• Question 1753: The gland directly affecting metabolic rate, growth and development is known as Options:
  A) adrenal land
  B) thyroid gland
  C) mammary gland
  D) parathyroid gland
  Show Answer
  The correct answer is B .
• Question 1754: Which path does sound entering the human ear follow? Options:
  A) Oval window → ossicles → ear drum
  B) Ear drum → oval window → ossicles
  C) Ear drum → ossicles → oval window
  D) Ossicles → ear drum → oval window
  Show Answer
  The correct answer is C .
• Question 1755:

  

  The structure above represents a quill feather. The structure labelled 'M' is the

  Options:
  A) quill
  B) rachis
  C) superior umbilicus
  D) inferior umbilicus
  E) aftershaft
  Show Answer
  The correct answer is C .
• Question 1756: A potometer is used to determine the rate at which a shoot Options:
  A) respires
  B) sucks air bubbles
  C) loses weight
  D) absorbs water
  E) transpires
  Show Answer
  The correct answer is E .
• Question 1757:

  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 1758: The process by which a red blood cell placed in distilled water absorbs water until it burst and releases its contents into the surrounding is known as Options:
  A) osmosis
  B) plasmolysis
  C) turgidity
  D) haemolysis
  Show Answer
  The correct answer is D .
• Question 1759:

  

  Use the diagram above to answer this question.The main function of the feathers covering the part labelled is to

  Options:
  A) prevent ectoparasites from attacking the animal
  B) generate heat to keep the animal warm
  C) provide some power for flight
  D) serve as insulator to maintain body heat
  Show Answer
  The correct answer is D .
• Question 1760:

  

  A hormone secreted at IV serves to

  Options:
  A) make the body react to emergencies
  B) lower blood glucose level
  C) raise the level of calcium ions in the blood
  D) facilitate the development of facial hairs
  Show Answer
  The correct answer is D .