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 271: The ratio of carriers to sicklers in the F₁ generation derived from a parental cross of two carriers of haemoglobin S gene is Options:
  A) 3 : 1
  B) 1 : 3
  C) 2 : 1
  D) 1 : 2
  Show Answer
  The correct answer is C .
• Question 272: The lumbar vertebra when compared with a thoracic vertebra has a Options:
  A) longer neural spines
  B) wider neural canal
  C) thicker centrum
  D) shorter transverse process
  Show Answer
  The correct answer is C .
• Question 273: In rhizopus carbohydrate is stored in the form of Options:
  A) Glucose
  B) Paramylon
  C) Glycogen
  D) Starch
  E) Oil
  Show Answer
  The correct answer is C .
• Question 274: 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 275: For growth to occur in organisms, the rate of Options:
  A) food storage must be low
  B) catabolism must exceed that of anabolism
  C) anabolism must exceed that of catabolism
  D) food storage must be high
  Show Answer
  The correct answer is C .
• Question 276: The loud cry made by a brooding hen when a predator is around is meant to Options:
  A) alert the poultry attendants
  B) attract cocks to come and fight the predator
  C) advertise the boundaries of its territory to intruders
  D) warn its chicks and other chickens of impending danger
  Show Answer
  The correct answer is D .
• Question 277: If R and r, denotes the genes for a character, the offspring of the cross between RR and Rr are Options:
  A) RR, 2Rr, rr
  B) 2RR, 2rr, 2rr
  C) 2RR, 2Rr
  D) 4Rr
  Show Answer
  The correct answer is C .
• Question 278: The sex-linked defect in which very slight cut produces severe bleeding is known as Options:
  A) anaesmia
  B) anorexia
  C) haemophilia
  D) haemolysis
  Show Answer
  The correct answer is C .
• Question 279: Trace elements are required by plants mainly for the Options:
  A) formation of pigments and enzymes
  B) production of energy and hormones
  C) manufactured of carbohydrates
  D) manufacture of proteins
  Show Answer
  The correct answer is A .
• Question 280: Which of these is not detected by the nerve endings of the skin? Options:
  A) cold
  B) pain
  C) pressure
  D) weakness
  Show Answer
  The correct answer is D .