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 1821:

  

  Which of the labelled tissues in the figure above is responsible for transport of mineral salts and water in living plants?

  Options:
  A) 1
  B) 2
  C) 3
  D) 4
  E) 5
  Show Answer
  The correct answer is C .
• Question 1822:
  

  The structure can be found in the

  Options:
  A) Sympathetic and parasympathetic nervous systems
  B) Peripheral and central nervous system
  C) Peripheral nervous system only
  D) Central nervous system only
  Show Answer
  The correct answer is B .
• Question 1823: An example of an organ of perennation in plants is Options:
  A) rhizome
  B) seed
  C) petal of a flower
  D) calyx of flower
  Show Answer
  The correct answer is A .
• Question 1824: The opening of the stoma is controlled by the Options:
  A) presence of a pore
  B) increase in solute concentration in the guard cells
  C) presence of guard cells
  D) decrease in solute concentration in the guard cells
  Show Answer
  The correct answer is B .
• Question 1825: In the woody stems, gaseous exchange takes place through the Options:
  A) micropyles
  B) stomata
  C) lenticels
  D) vessels
  Show Answer
  The correct answer is C .
• Question 1826:

  The correct sequence for the perception of smell in mammals is?

  Options:
  A) chemicals --> olfactory nerve endings --> brain
  B) dissolved chemicals --> nasal sensory cells --> brain
  C) chemicals --> mucus membrane sensory cells --> brain
  D) dissolved chemicals --> sensory cells --> olfactory nerve --> brain
  Show Answer
  The correct answer is D .
• Question 1827: A relationship between living organisms which is of mutual benefit is Options:
  A) parasitism
  B) saprophtism
  C) ecosystem
  D) symbiosis
  E) commensalism
  Show Answer
  The correct answer is D .
• Question 1828: What will be the result of the first filial generation (F₁) and the second filial generation (F₂) of a mono-hybrid cross between pure line normal-winged Drosophilia flies and pure line short-winged flies, if the gene for the normal wing is dominant? Options:
  A) F₁ flies all short-winged and F₂ flies all normal-winged
  B) F₁ flies all normal and F₂ flies all short-winged
  C) F₁ flies all short-winged and three-quarters of F₂ flies are short-winged
  D) F₁ flies all normal-winged and three-quarters of F₂ flies are normal-winged
  Show Answer
  The correct answer is D .
• Question 1829:

  The period of inactivity seen in some animals during long period of heat or drought is

  Options:
  A) Migration
  B) Aestivation
  C) Hibernation
  D) Adaptation
  Show Answer
  The correct answer is B .
• Question 1830: In fresh water marshes and swamps, the most important abiotic factors that organisms have to adapt to is Options:
  A) nature of substratum
  B) high salinity
  C) high temperature
  D) low pH
  Show Answer
  The correct answer is A .