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 2021: Exoskeleton is NOT found in the Options:
  A) Maggot
  B) Mosquito larva
  C) Earth worm
  D) Caterpillar
  E) Termite
  Show Answer
  The correct answer is C .
• Question 2022: The correct sequence of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside is Options:
  A) pith, phloem, cambium, xylem, parenchyma, collenchyma and epidermis
  B) xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis
  C) pith, xylem, cambium, phloem, collenchyma, parenchyma and epidermis
  D) phhloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis
  Show Answer
  The correct answer is C .
• Question 2023: Another name for a fertilized egg is a Options:
  A) placenta
  B) zygote
  C) foetus
  D) ovum
  Show Answer
  The correct answer is B .
• Question 2024: In a dicot leaf, guard cells differ from other epidermal cells because they Options:
  A) have no definite shape
  B) lack nuclei
  C) are smaller
  D) contain chloroplast
  E) lack vacuole
  Show Answer
  The correct answer is D .
• Question 2025: The activity of ptyalin is likely to decrease with an increase in the concentration of Options:
  A) oxygen
  B) starch
  C) protein
  D) acid
  Show Answer
  The correct answer is D .
• Question 2026: When two heterozygotes mate, the dominant trait will appear in Options:
  A) the F₁ generation only
  B) the F₂ generation only
  C) both the F₁ and F₂ generations
  D) neither the F₁ nor F₂ generation
  Show Answer
  The correct answer is C .
• Question 2027: If the cross of a red-flowered plant with a white-flowered plant produces a pink-flowered plant, it is an example of Options:
  A) codominance
  B) incomplete dominance
  C) mutation
  D) linkage
  Show Answer
  The correct answer is B .
• Question 2028: Viruses differ from all forms of life because they Options:
  A) have thick cell wall
  B) feed on waste products of other organisms
  C) causes infectious diseases
  D) require other living cells to multiply
  Show Answer
  The correct answer is D .
• Question 2029: The major function of contractile vacuole in amoeba is Options:
  A) to secrete enzyme to digest food particles
  B) to store excess food materials
  C) to excrete nitrogenous waste
  D) to absorb water from the surrounding
  E) to collect and expel water in the cytoplasm
  Show Answer
  The correct answer is E .
• Question 2030: The function of the ossicles (malleus, incus and stapes) in the mammalian ear is Options:
  A) Transmission of vibrations
  B) Regulation of pressure
  C) Support of the inner ear
  D) Maintenance of balance during motion
  E) Secretion of oil
  Show Answer
  The correct answer is A .