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 2111:

  In the root vascular system, the stele is directly surrounded by the

  Options:
  A) pericycle
  B) cortex
  C) endodermis
  D) parenchyma
  Show Answer
  The correct answer is C .
• Question 2112: Most commercial fertilizers are rich in salts of Options:
  A) sodium, iron and calcium
  B) nitrogen, phosphorus and potassium
  C) iron, copper and nitrogen
  D) calcium, sodium and phosphorus
  Show Answer
  The correct answer is B .
• Question 2113: The basic point of impact by changes which produce mutation is the Options:
  A) gametes
  B) chromosomes
  C) phenotype
  D) zygote
  Show Answer
  The correct answer is B .
• Question 2114: The DNA molecule is a chain of repeating Options:
  A) nucleosides
  B) nitrogenous bases
  C) sugar phosphates
  D) nucleotides
  Show Answer
  The correct answer is D .
• Question 2115:

  

  The neural arch is labelled

  Options:
  A) I
  B) II
  C) III
  D) IV
  Show Answer
  The correct answer is B .
• Question 2116:

  

  At which stage in this cycle can a man be infected?

  Options:
  A) 2
  B) 4
  C) 5
  D) 6
  Show Answer
  The correct answer is A .
• Question 2117: A gene which expresses itself only in the homozygous condition is Options:
  A) a mutant
  B) dominant
  C) recessive
  D) lethal
  Show Answer
  The correct answer is C .
• Question 2118: 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 .
• Question 2119: If you cross breed a tall variety (Tt) of maize with a short variety (tt), the ratio of tall to short plants in the offspring will be Options:
  A) 2:1
  B) 1:2
  C) 1:1
  D) 1:3
  E) 3:1
  Show Answer
  The correct answer is C .
• Question 2120: One of the ways which body cells differ from gamete cells is in the Options:
  A) type of centromeres they contain
  B) number of chromosomes pairs they contain
  C) type of chromatide they contain
  D) number of chromosomes they contain
  Show Answer
  The correct answer is D .