Waec 1990 Biology Past Questions And Answers
Which of the following is the effect of using artificial pollination in plant breeding?
- A. Production of healthy crops
- B. Improvement of the variety of crops
- C. Making crops susceptible to crops
- D. Lengthening the maturity time of crops
(a) Describe briefly the process involved in the breakdown of glucose in the cell of living organisms to produce energy (AT P)
(b) State two conditions under which glycogen can be converted to glucose to produce energy.
(c) Describe an experiment to demonstrate that oxygen is released by green plants during photosynthesis.
A dry indehiscent fruit containing one seed and possessing a hairy pappus is described as
- A. a nut
- B. a drupe
- C. a cypsela
- D. a follicle
Which of the following is not a way of reducing air pollution?
- A. Siting factories and power stations away from residential areas
- B. Building tall factory chimneys
- C. Passing waste gases through filters and absorbers
- D. Using lead-free petrol in cars
At which of the following stages of mitosis do the two daughter chromosomes separate completely?
- A. Early prophase
- B. Telophase
- C. Anaphase
- D. Late prophase
Thunderstorm can be beneficial to plants because it
- A. kills the pest that attacks crops
- B. destroys some of the major crops
- C. adds nitrates to the soil
- D. adds lime to the soil
Which of the following structures controls the activities of the living cell?
- A. Nucleus
- B. Centrosome
- C. Chloroplast
- D. Golgi body
Which of the following reagents is used for the test for starch?
- A. Million
- B. Fehling
- C. Sudan III
- D. Iodine solution
Which of the following stimuli are not perceived through the skin of mammals?
- A. Light
- B. Pressure
- C. Pain
- D. Heat
(a) (i) Give two reasons why termites are described as social insects.
(ii) Name four castes found in the termite nest, stating one of each castes.
(b) Describe five behavioural adaptations of termites which enable them to survive in their environment
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