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 1831:

  Petaloid sepals serve the function of

  Options:
  A) carrying out photosynthesis
  B) attracting pollinating agents to a flower
  C) retaining pollen grains in the corolla tubes
  D) protecting the inner floral parts of the flower
  Show Answer
  The correct answer is D .
• Question 1832:

  

  In the diagram, the experiment demonstrates

  Options:
  A) geotropism
  B) thigmotropism
  C) phototropism
  D) hydrotropism
  Show Answer
  The correct answer is A .
• Question 1833: If a healthy potted plant is continuously kept in dim light Options:
  A) the rate of respiration may equal that of photosynthesis
  B) more carbondioxide and water are taken in
  C) respiration may be halted
  D) the volume of oxygen released increase
  Show Answer
  The correct answer is A .
• Question 1834: The specific number of chromosomes in each somatic cell is represented by Options:
  A) 2^N
  B) 23
  C) 2N
  D) N
  Show Answer
  The correct answer is C .
• Question 1835: The first step in the process of photosynthesis is the Options:
  A) activation of the chlorophyll
  B) photolysis of water
  C) reduction of carbondioxide
  D) formation of sugar
  Show Answer
  The correct answer is A .
• Question 1836: If the anthers of a flower mature before the stigma, the condition is termed Options:
  A) epigyny
  B) hypogyny
  C) protogyny
  D) protandry
  E) perigyny
  Show Answer
  The correct answer is D .
• Question 1837: Which of the following is an organ? Options:
  A) Guard cell
  B) Liver
  C) Xylem bundle
  D) Blood
  Show Answer
  The correct answer is B .
• Question 1838:

  The mutation theory of organic evolution was propounded by?

  Options:
  A) Gregor Mendel
  B) Hugo de Vries
  C) Jean Lamarck
  D) Charles Darwin
  Show Answer
  The correct answer is B .
• Question 1839: The physical and climatic factors of a region primarily determine the Options:
  A) kinds of animal inhabiting the area
  B) types of plants found in the area
  C) nature of the soil in that region
  D) community of organisms in the region
  Show Answer
  The correct answer is D .
• Question 1840: Grasses grasshopper lizard snakes hawks. In the food chain, the organism which are the least in number are Options:
  A) grasses
  B) grasshopper
  C) lizards
  D) snakes
  E) hawks
  Show Answer
  The correct answer is E .