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 461: An association between the root nodule of a leguminous plant and rhizobium sp, is known as Options:
  A) commmensalism
  B) mycorrhiza
  C) parastism
  D) symbiosis
  Show Answer
  The correct answer is D .
• Question 462:

  Which of the following waste products in plants is excreted through the stomata and lenticles?

  Options:
  A) carbon dioxide
  B) alkaloids
  C) tannins
  D) anthoocyanins
  Show Answer
  The correct answer is A .
• Question 463: The uniqueness of an individual organism in a population is accounted for by Options:
  A) evolution
  B) variation
  C) adaptation
  D) mutation
  Show Answer
  The correct answer is C .
• Question 464: The micro-organisms that causes Typhoid disease is Options:
  A) trypanosome gambiense
  B) Salmonella typhi
  C) entamocbahistolytica
  D) plasmodium sp
  Show Answer
  The correct answer is B .
• Question 465: The carrier of the hereditary character in plants and animal is the Options:
  A) Cell
  B) Nucleus
  C) Chromosome
  D) Chloroplast
  E) Gene
  Show Answer
  The correct answer is C .
• Question 466: If R and r, denotes the genes for a character, the offspring of the cross between RR and Rr are Options:
  A) RR, 2Rr, rr
  B) 2RR, 2rr, 2rr
  C) 2RR, 2Rr
  D) 4Rr
  Show Answer
  The correct answer is C .
• Question 467:

  Which of the following factors is not considered in a terrestial habitat?

  Options:
  A) Temperature
  B) Sunlight
  C) Humidity
  D) Turbidity
  Show Answer
  The correct answer is D .
• Question 468: In a field experiment, the frequency of water leaf was observed to be 48 after 20 tosses of a 2m² quadrat. What is the density of the plants in the field? Options:
  A) 1.2 per m²
  B) 2.4 per m²
  C) 4.8 per m²
  D) 9.6 per m²
  Show Answer
  The correct answer is A .
• Question 469: The structure found only in the plant cells are Options:
  A) cell membrane and cytoplasm
  B) chromatin and nucleolus
  C) cell wall and chloroplast
  D) cell membrane and lysosome
  Show Answer
  The correct answer is C .
• Question 470: Which of the following hormones is produced during fright or when agitated? Options:
  A) Insulin
  B) Adrenalin
  C) Thyroxine
  D) Pituitrin
  E) Progesterone
  Show Answer
  The correct answer is B .