Waec 2012 Biology Past Questions And Answers
Which of the following digestive enzymes would be greatly affected if the liver fails to produce bile?
- A. Amylase
- B. Cellulase
- C. Lipase
- D. Protease
The primary cause of species endangerment is
- A. disappearing habitats
- B. increase in temperatures
- C. acid rain
- D. exposure to hazardous wastes
Which of the following food substances will have little or no calorific value?
- A. Proteins
- B. Carbohydrates
- C. Lipids
- D. Water
The use of water closet and septic tanks is preferred to the use of bucket and pit latrines because
- A. it is cost effective
- B. contaminated faeces are completely kept away from flies
- C. the water for flushing contains chlorine which kills the germs
- D. It prevents flies from breeding
The science of life is referred to as
- A. anatomy
- B. biology
- C. ecology
- D. phylogeny
A space containing a group of interactive organisms is called
- A. community
- B. habitat
- C. ecosystem
- D. population
(a) Describe briefly the role of the stomach in digestion.
(b) (i) Name three parts of plants in which food can be stored.
(ii) Give one example in each case.
(c) Explain briefly how the level of sugar in the mammalian blood can be regulated.
View Discussion (0)WAEC 2012 THEORYWhich of the following instruments would be most appropriate in comparing the air pressure at different places in the habitat?
- A. Hygrometer
- B. Barometer
- C. Photometer
- D. Air pressure disc
What is the benefit of thunder and lightning to farmers?
- A. Addition of nitrates to the soil
- B. Aeration of the soil
- C. Removal of harmful bacteria from the soil
- D. Addition of rain water to the soil
In the structure of DNA, which of the following statements is true?
- A. The double helix are held together by covalent bonds
- B. Nucleotide is made up of ribose, phosphate and an organic nitrogen compound
- C. Guanine is the opposite of cytosine
- D. Adenine is the opposite of cytosine