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 541: The scarcity of food causes a sudden decrease in population size by Options:
  A) decreasing the reproductive rate
  B) bringing about immigration
  C) raising the mortalility rate
  D) minimizing the rate of competition
  Show Answer
  The correct answer is C .
• Question 542:

  Use the diagram to answer the question.

  The process of water loss and intake indicated by the arrows labelled i and ii are respectively

  Options:
  A) evaporation and osmosis
  B) osmosis and exhalation
  C) osmosis and diffusion
  D) urination and diffusion
  Show Answer
  The correct answer is B .
• Question 543: which of these diseases cannot be controlled by killing the vector? Options:
  A) River blindness
  B) Malaria
  C) Polio
  D) Cholera
  E) Bilharzia (shistosoma)
  Show Answer
  The correct answer is C .
• Question 544: The group of insects that have mouth parts adapted for both piercing and sucking is Options:
  A) cockroach, aphids and mosquitoes
  B) aphids, houseflies and moths
  C) mosquitoes, tse-tse flies and aphids
  D) aphids, beetles and grasshoppers
  Show Answer
  The correct answer is C .
• Question 545: Vaccination is carried out in order to Options:
  A) check the production of poison
  B) increase the activity of white blood cells
  C) increase the number of red blood cells
  D) stimulate the production of antibodies
  Show Answer
  The correct answer is D .
• Question 546: The most important adaptation of xerophytes is the ability of the protoplasm to Options:
  A) resist being damaged by loss of water
  B) store sugar and minerals in the vacuoles
  C) absorbs water and swell
  D) shrink from the cell wall
  Show Answer
  The correct answer is A .
• Question 547: The progressive loss of energy at each level in a food chain leads to Options:
  A) an increase in biomass at each successive level
  B) a decrease in biomass at each successive level
  C) an increase in the number of organism at each successive level
  D) an increase in the total number of organisms at each successive level
  Show Answer
  The correct answer is B .
• Question 548:

  

  The parts used for feeding is labelled

  Options:
  A) I
  B) J
  C) K
  D) L
  Show Answer
  The correct answer is C .
• Question 549:

  The type of fruit that is formed from a single flower having several free carpels is?

  Options:
  A) indehiscent fruit
  B) aggregate fruit
  C) simple fruit
  D) fleshy fruit
  Show Answer
  The correct answer is B .
• Question 550: The host of liver flake are ______? Options:
  A) pig and snail
  B) pig and sheep
  C) sheep and snail
  D) pig
  Show Answer
  The correct answer is B .