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 301:

  If a DNA strand has a base sequence TCA, its complementary strand mustbe?

  Options:
  A) ATG
  B) TAG
  C) GAT
  D) AGT
  Show Answer
  The correct answer is D .
• Question 302: A tall plants crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents? Options:
  A) TT, TT
  B) Tt, tt
  C) TT, tt
  D) Tt, Tt
  Show Answer
  The correct answer is B .
• Question 303: The plantain reproduces asexually by Options:
  A) suckers
  B) buds
  C) fragments
  D) spores
  Show Answer
  The correct answer is A .
• Question 304:

  

  Use the diagram above to answer this question.

  During photosynthesis, the arrow labelled ll represents the

  Options:
  A) escape of mineral salts
  B) absorption of energy from the sun
  C) release of carbon (IV) oxide
  D) release of oxygen as a by-product
  Show Answer
  The correct answer is D .
• Question 305: Monocot stem differ from dicot stems in that monocot have Options:
  A) no cambium
  B) no pith
  C) fewer vascular bundles
  D) phloems with parenchyma
  Show Answer
  The correct answer is A .
• Question 306: Plants of temperate origin can be grown in tropical areas in the vegetation zones of the Options:
  A) rain forest
  B) guinea savanna
  C) sudan savanna
  D) montane forest
  Show Answer
  The correct answer is B .
• Question 307: The hepatic portal vein is unique because it Options:
  A) carries deoxygenated blood
  B) begins and ends with capillaries
  C) is the largest vein in mammals
  D) carries digested food
  E) is the shortest vein in mammals
  Show Answer
  The correct answer is D .
• Question 308: Alkaline pyrogallol was used in an experiment. That experiment must have been connected with Options:
  A) Excretion
  B) Germination
  C) Transpiration
  D) Digestion
  E) Photosynthesis
  Show Answer
  The correct answer is E .
• Question 309: An increase in air pressure in the lungs is due to the Options:
  A) increase in the volume of the thoracic cavity
  B) upward movement of he ribs
  C) relaxation of the diaphragm
  D) contraction of the intercostal musles
  Show Answer
  The correct answer is C .
• Question 310: The theory of use and disuse of organs was promulgated by Options:
  A) Alfred Wallace
  B) Charles Darwin
  C) Gene Lamarck
  D) Robert Hook
  Show Answer
  The correct answer is C .