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 321: The gland that is found just below the hypothalamus is the Options:
  A) parathyroid
  B) adrenal
  C) pituitary
  D) thyroid
  Show Answer
  The correct answer is C .
• Question 322:

  The temporary union of two organisms and the exchange of micronuclear elements is called

  Options:
  A) Conjugation
  B) Binary fusion
  C) Extrapolation
  D) Interexchange
  Show Answer
  The correct answer is A .
• Question 323: The tips of some rice seedlings were cut off while some were left intact. Both were covered with a container which had not only one small hole to allow light through. After twenty-four hours it was observed that Options:
  A) the cut tips was bent away from the light
  B) the cut tips bent towards source of light
  C) the intact tips bent away from the light
  D) the intact tips bent towards the light
  E) both tips bent away from light
  Show Answer
  The correct answer is D .
• Question 324:

  The movement of part of a plant in response to external stimulus of no particular direction is?

  Options:
  A) taxism
  B) tropism
  C) haptotropic movement
  D) nastic movement
  Show Answer
  The correct answer is D .
• Question 325: Roots of plants are normally Options:
  A) Positively phototropic
  B) Negatively geotropic
  C) Negatively hydrotropic
  D) Positively hydrotropic
  E) Negatively chemotropic
  Show Answer
  The correct answer is D .
• Question 326: Free nitrogen is released to the atmosphere by Options:
  A) Nitrogen-fixing bacteria
  B) nitrifying bacteria
  C) denitrifying bacteria
  D) saprophytic bacteria
  Show Answer
  The correct answer is C .
• Question 327: A centipede differs from a millipede by its Options:
  A) colour
  B) numerous abdominal segment
  C) paired legs on each abdominal segment
  D) poison claws
  E) cylindrical body
  Show Answer
  The correct answer is D .
• Question 328: When a colour-blind man marries a carrier woman. What is the probability of their offspring being colour blind? Options:
  A) 25%
  B) 50%
  C) 75%
  D) 100%
  Show Answer
  The correct answer is B .
• Question 329: In plant cells, the chloroplast are located Options:
  A) inside the cell wall
  B) outside the protoplasm
  C) within the vacuole
  D) within the cytoplasm
  Show Answer
  The correct answer is D .
• Question 330: The movement response of a cockroach away from a light source can be described as Options:
  A) positive phototaxism
  B) negative phototaxism
  C) negative phototropism
  D) positive phototropism
  Show Answer
  The correct answer is B .