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 261: A phenomenon by which an animal goes into a state of dormancy during the dry season is called Options:
  A) hibernation
  B) aestivation
  C) incubation
  D) deactivation
  Show Answer
  The correct answer is B .
• Question 262: a potometer was used to compare the rate of loss of the same volume of water from a plant under different environmental conditions as under a fan, at the sea shore, under the sun, in the airy laboratory and in cupboard. What time was likely to have been obtained in a cupboard? Options:
  A) 15 secs
  B) 30secs
  C) 25secs
  D) 20secs
  E) 28secs
  Show Answer
  The correct answer is B .
• Question 263: Environmental pollutants which can work through the media of water, soil and air include Options:
  A) carbon monoxide
  B) noise
  C) sulphur(IV)oxide
  D) smoke
  Show Answer
  The correct answer is C .
• Question 264: The bright colours of the comb and feathers in the peacock are for Options:
  A) sex differenciation
  B) beauty
  C) courtship
  D) defence
  Show Answer
  The correct answer is C .
• Question 265: Secondary thickening is initiated in a dicotyledonous stem by the Options:
  A) xylem parenchyma
  B) secondary phloem
  C) endodermis
  D) cambium
  Show Answer
  The correct answer is D .
• Question 266: The maize grain is regarded as a fruit and not a seed because Options:
  A) it has a coleorhiza
  B) it has a coleoptile
  C) of the relatively large endosperm
  D) there is the remain of a style
  E) of the relatively small scutellum
  Show Answer
  The correct answer is D .
• Question 267: In the gene locus for eye colour in humans, the allele for brown eye is dominant over the allele for blue eyes. If a homozygous brown-eyed girl has a brother with blue eyes, what are the likely phenotypes of there parents'eye colour (Eye colour is not a sex linked trait) Options:
  A) Both parents have blue eyes
  B) Their father has blue eyes and their mother has brown eyes
  C) both parents have brown eyes
  D) Their mother has the blue eyes and their father has the brown eyes
  Show Answer
  The correct answer is C .
• Question 268:
  

  The part numbered 12 is

  Options:
  A) pectoral fin
  B) scale
  C) opercular plate
  D) gill plate
  E) pectoral girdle
  Show Answer
  The correct answer is C .
• Question 269: Which of the following is involved in secondary thickening in plants? Options:
  A) Collenchyma and xylem cells
  B) Vascular cambium
  C) Cork cambium and sclerenchyma
  D) Vascular cambium and cork cambium
  Show Answer
  The correct answer is D .
• Question 270: The greatest amount of energy will be obtained by the oxidation of 100kg of Options:
  A) meat
  B) butter
  C) sugar
  D) biscuits
  Show Answer
  The correct answer is B .