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 491:

  Which of the following cycles involves the process of precipitation and transpiration?

  Options:
  A) water cycle
  B) carbon cycle
  C) nitrogen cycle
  D) oxygen cycle
  Show Answer
  The correct answer is A .
• Question 492: The structure that is most commonly identified in all living cells under the light microscope is the Options:
  A) mitochondrion
  B) chloroplast
  C) nucleus
  D) ribosome
  Show Answer
  The correct answer is C .
• Question 493: The ability of a living organism to detect and respond to changes in the environment is referred to as Options:
  A) locomotion
  B) taxis
  C) irritability
  D) growth
  Show Answer
  The correct answer is C .
• Question 494: Which of the following is true of the transverse section of a dicot system? Options:
  A) the xylem is more interiory located than the phleom
  B) the cambium lies between the cortex and the vascular bundles
  C) the vascular bundles are randomly scattered within the cortex
  D) the epidemis is completely encircled by the cortex
  Show Answer
  The correct answer is A .
• Question 495: In the internal structure of plants, a wide pith in the centre is common to Options:
  A) dicot stems and monocot stems
  B) dicot stem and monocot roots
  C) dicot roots and monocot roots
  D) dicot roots and monocot stems
  Show Answer
  The correct answer is B .
• Question 496:

  

  In the illustration above, the genotypes of the offsprings are

  Options:
  A) 1 heterozygous smooth : 2 homozygous smooth : 1 wrinkled
  B) 1 homozygous smooth : 2 heterozygous smooth : 1 wrinkled
  C) 2 homozygous smooth : 2 wrinkled
  D) 3 heterozygous smooth : 2 wrinkled
  Show Answer
  The correct answer is B .
• Question 497: Which of the following substance is not found in urine? Options:
  A) Water
  B) Sodium chloride
  C) Nitrogenous compounds
  D) Calcium chloride
  E) Nitrogenous salts
  Show Answer
  The correct answer is D .
• Question 498:

  The level of organization of Amoeba and Euglena cell is ________?

  Options:
  A) organ
  B) system
  C) cell
  D) tissue
  Show Answer
  The correct answer is C .
• Question 499:

  Most fishes do not sink in water because of the presences of:
  I. swim bladder
  II. air bladder
  III. air sacs
  IV. air in spongy bones

  Options:
  A) II and III are correct
  B) I and II are correct
  C) I, II, III and IV are correct
  D) III and IV are correct
  Show Answer
  The correct answer is B .
• Question 500: The supporting tissue in xylem is most poorly developed in Options:
  A) mangrove swamp plants
  B) grassland plants
  C) submerged water plants
  D) desert plants
  Show Answer
  The correct answer is C .