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 1231: A state in Nigeria that is most susceptible to desert encroachment is Options:
  A) Kwara
  B) Taraba
  C) Kaduna
  D) Katsina
  Show Answer
  The correct answer is D .
• Question 1232:

  

  Which ecological factor exerts the greatest influence on the structure of the profiles?

  Options:
  A) Topographic
  B) Edaphic
  C) Biotic
  D) Climatic
  Show Answer
  The correct answer is D .
• Question 1233: Which of these is a trace element? Options:
  A) Iron
  B) Copper
  C) Calcium
  D) Sulphur
  Show Answer
  The correct answer is B .
• Question 1234: The functional unit of a mammalian kidney is the Options:
  A) urethra
  B) malphigian capsule
  C) glomerulus
  D) nephron
  E) ureter
  Show Answer
  The correct answer is D .
• Question 1235: An example of cryptic colouration is the Options:
  A) Mottled colours on the moths that rest in lichens
  B) bright colour of an insect pollinated flower
  C) Green colour of a plant
  D) Bright marks on poisonous tropical frog on veriegated leaves
  Show Answer
  The correct answer is A .
• Question 1236:

  

  In the illustration above, the genotypes of the offsprings are

  Options:
  A) 1 heterozygous smooth : 2 homozygous smooth : 1 wrinkled
  B) 1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
  C) 2 homozygous smooth : 2 wrinkled
  D) 3 heterozygous smooth : 2 wrinkled
  Show Answer
  The correct answer is B .
• Question 1237: Monocot stem differ from dicot stems in that monocot have Options:
  A) no cambium
  B) no pith
  C) fewer vascular bundles
  D) phloems with parenchyma
  Show Answer
  The correct answer is A .
• Question 1238: 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 1239: Kwashiorkor is caused by severe deficiency of Options:
  A) Water
  B) Oil
  C) Drugs
  D) Proteins
  E) Sugars
  Show Answer
  The correct answer is D .
• Question 1240:

  

  In the diagram, the experiment demonstrates

  Options:
  A) geotropism
  B) thigmotropism
  C) phototropism
  D) hydrotropism
  Show Answer
  The correct answer is A .