Waec 2010 Biology Past Questions And Answers
Which of the following food substances is incorrectly linked to its enzyme?
- A. Protein - trypsin
- B. Fat - lipase
- C. Sucrose - pepsin
- D. Starch - amylase
Which of the following factors is the main problem facing xerophytic plants?
- A. Competition for sunlight
- B. Conservation of excess water
- C. inadequate roots for water absorption
- D. Lack of adequate water
Which of the following pH values is the best for the action of the enzymes - renin and pepsin in the stomach?
- A. pH2
- B. pH7
- C. pH8
- D. pH9
The speed of wind is measured using the
- A. wind vane
- B. anemometer
- C. photometer
- D. barometer
An organism that operates at the cellular level of organization, carries out its physiological activities by using its
- A. cell membrane
- B. organelles
- C. small size
- D. cytoplasm
The bacterium in a mutualistic association with legumes converts
- A. nitrates to ammonia
- B. ammonium compounds to nitrites
- C. nitrogen gas to ammonia
- D. nitrites to nitrates
(a) Write short notes on each of the following:
(i) ecological niche
(ii) population density
(iii) climax continually
(b) Describe briefly the interactions between abiotic and biotic components of an ecosystem.
View Discussion (0)WAEC 2010 THEORYIn a particular habitat the role of an organism is referred to as its
- A. level
- B. biomass
- C. niche
- D. space
Which of the following structures produces the greatest variety of digestive enzymes?
- A. Salivary glands
- B. Pancreas
- C. Stomach
- D. Colon
Transportation of water in the xylem tissue involves the following except
- A. root pressure
- B. capillary action
- C. transpiration pull
- D. translocation