21. Which of the following processes removes carbon from the atmosphere?
- A. putrefaction
- B. photosynthesis
- C. volcanic eruption
- D. burning of fuels
22. Which of the following cycles involves the process of precipitation and transpiration?
- A. water cycles
- B. carbon cycle
- C. nitrogen cycle
- D. oxygen cycle
23. What is the critical limiting factor for plants below the photic zone in an aquatic ecosystem?
- A. availability of nutrients
- B. availability of water
- C. intensity of light
- D. carbon dioxide concentration
24. Which of the following instruments is used to estimate the number of plants in a habitat?
- A. pooter
- B. pitfall trap
- C. quadrant
- D. sweep net
25. Which of the following statements is true about sandy soil?
- A. has limited air space
- B. is light and easy to dig
- C. drains slowly
- D. is heavy and poorly aerated
26. Which of the following organisms is a primary consumer?
- A. dog
- B. sheep
- C. grass
- D. fungus
27. Study the diagram of a food chain shown and use; it to answer the question.
P —> Q —> R —> S —> T
The organism designated P in the food chain above is normally sustained by energy from
- A. sunlight
- B. carbohydrates
- C. green plants
- D. mineral salts
28.
Study the diagram of a food chain shown and use; it to answer the question.
P —> Q —> R —> S —> T
Which of the following statements best describes the organism designated R? It
- A. feeds on S
- B. is a primary consumer
- C. is a producer as well as a consumer
- D. is a secondary consumer
29. Which of the following diseases is not hereditary?
- A. Albinism
- B. Scabies
- C. Haemophilla
- D. Colour blindness
30. The immediate product of meiosis in flowering plants is the
- A. sporophyte
- B. gametophyte
- C. zygote
- D. pollen grains
2 thoughts on “Biology 2018 JAMB Past Questions”
can you please verify the answer for biology 2018 jamb question 29. I think the correct answer should be Scabies, that is option B and not A since albinism is an autosomal recessive disorder, hence it is hereditary.
Thank you Solomon, you are 100% correct and it has been corrected and updated.