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 921: A yellow maize is planted and all the fruits obtained are of yellow seeds. When they are croos-bred, yellow seeds and white seeds are obtained in a ratio 3:1 . The yellow seed is said to be Options:
  A) non-heritable
  B) sex-linked
  C) a recessive trait
  D) a dominant trait
  Show Answer
  The correct answer is D .
• Question 922: The factors that determine the distribution of vegetation zones are Options:
  A) temperature, light, rain and humidity
  B) light, humidity, air and mist
  C) temperature, light, air and humidity
  D) humidity, snow, frost and dew
  Show Answer
  The correct answer is A .
• Question 923: A fundamental similarity between nervous and hormonal system is that both Options:
  A) involve chemical transmission
  B) have widespread effects
  C) shed chemicals into the blood stream
  D) evoke rapid responses
  Show Answer
  The correct answer is D .
• Question 924: The function of maxillipeds in crayfish is to aid Options:
  A) walking
  B) swimming
  C) feeding
  D) respiration
  Show Answer
  The correct answer is C .
• Question 925: The organism that has a hydrostatic skeleton is Options:
  A) Tilapia
  B) Hydra
  C) mosquito larva
  D) earthworm
  Show Answer
  The correct answer is D .
• Question 926:

  

  Use the diagram above to answer this question. The young proglottid is represented by

  Options:
  A) III
  B) IV
  C) I
  D) II
  Show Answer
  The correct answer is B .
• Question 927:

  Spirogyra reproduces vegetatively by

  Options:
  A) spore production
  B) fragmentation
  C) multiple fission
  D) budding
  E) binary fission
  Show Answer
  The correct answer is B .
• Question 928: Blood platelets are important because they are Options:
  A) amoeboid and nucleated
  B) produce antitoxins
  C) produce antibodies
  D) digest harmful bacteria
  E) release thrombin for blood clothing
  Show Answer
  The correct answer is E .
• Question 929: The sheet of muscle that separates the thoracic and the abdominal cavities is the Options:
  A) diaphragm
  B) intercostal muscle
  C) pleural memberane
  D) pericardium
  Show Answer
  The correct answer is A .
• Question 930:

  People who suck petrol with their mouths run the risk of increasing in their blood the concentration of

  Options:
  A) iron
  B) lead
  C) calcium
  D) magnesium
  Show Answer
  The correct answer is B .