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 1: In the mammalian skin, melanin and keratin are contained in the Options:
  A) sebaceous gland
  B) sweat gland
  C) subcubaneous layer
  D) malpighian layer
  Show Answer
  The correct answer is D .
• Question 2: In which of the following species is the biomass of an individual the smallest? Options:
  A) Tilapia sp
  B) Agama sp
  C) Bufo sp
  D) Spirogvra sp
  Show Answer
  The correct answer is D .
• Question 3: Which of the following hormonal glands is located on top of the kidney? Options:
  A) Adrenal
  B) gonads
  C) pancreas
  D) thyroid
  Show Answer
  The correct answer is A .
• Question 4: The initial volume of water poured into 60g bag of dry soil was 50ml and the amount that drained through was 35ml. The percentage water content of the fully soaked soil is therefore Options:
  A) 46.7
  B) 25.0
  C) 20.0
  D) 30.0
  E) 58.3
  Show Answer
  The correct answer is D .
• Question 5: The bacteria that is found in the root nodules of leguminous plants is Options:
  A) clostridium
  B) rhizobium
  C) nostoc
  D) azotobacter
  Show Answer
  The correct answer is B .
• Question 6: When the adults have reach a certain degree of weakness, the process of binary fission is replaced by conjugation in Options:
  A) Paramecium
  B) Euglena
  C) Amoeba
  D) Plasmodium
  Show Answer
  The correct answer is A .
• Question 7: The main waste products formed in plants are Options:
  A) alkaloids tannins and resins
  B) water, alkaloids and carbondioxde
  C) oxygen, carbondioxide and alkaloids
  D) water, carbondioxide and oxygen
  Show Answer
  The correct answer is A .
• Question 8:

  Given the equation:

  6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ {Under sunlight & Chlorophyll)

  The oxygen given off during the above process is derived from

  Options:
  A) sunlight
  B) chlorophyll
  C) carbon dioxide
  D) atmosphere
  E) water
  Show Answer
  The correct answer is E .
• Question 9: Which of the following stimuli is likely to elicit a nastic response in an organism? Options:
  A) Touch
  B) Light intensity
  C) Chemical substances
  D) Gravity
  Show Answer
  The correct answer is C .
• Question 10:

  The reason why hospitals use saline solutions as drip instead of water is

  Options:
  A) because salt is a preservative
  B) to prevent contamination of the body
  C) to maintain the composition of body fluids
  D) to increase the number of blood cells
  Show Answer
  The correct answer is C .