Biology Past Questions And Answers
The function of maxillipeds in crayfish is to aid
- A. walking
- B. swimming
- C. feeding
- D. respiration
(a) (i) What is Pollution?
(ii) Name two pollutants each of air and water.
(b) (i) State four effects of water pollution.
(ii)Mention four ways of preventing water pollution in an environment.
(c) (i) Name three sources of noise pollution.
(ii) State three effects of noise pollution on man.
View Discussion (0)WAEC 1999 THEORYWhich of the following is an example of physiological variation in organisms?
- A. Variation in blood pressure among individuals
- B. Variation in beak shape among finches
- C. Differences in fur color in rabbits
- D. Variation in leaf shape in plants
Which of the following is the youngest plant tissue
- A. Meristem
- B. Phloem
- C. Epidermis
- D. Xylem
Which of the following activities promotes forest conservation?
- A. Lumbering
- B. Use of firewood for cooking
- C. Afforestation
- D. Production of paper
Neurons that receive stimuli from the body or internal organs are called
- A. sensory neurons
- B. efferent neurones
- C. motor neurones
- D. relay neurones
A crucible of 5 g m weighed 10 gm after filling with fresh soil. it is then heated in an oven at 100°c for 1 hour. After cooling in a desiccator, the weight was 8 gm. The percentage of water in the soil is
- A. 80%
- B. 60%
- C. 20%
- D. 40%
Which of these is not a true characteristic of the tropical rain forest?
- A. Vegetation consists predominantly of tall trees, with thick canopy
- B. Forest is rich in epipphysis and climbers
- C. Annual rainfall is less than 100 cm
- D. interior has low light intensity, high humidity and damp floor
Which of the followig traits in humans is an example of physiological variation?
- A. skin colour
- B. fingerprint
- C. tongue rolling
- D. height
Thyroxine and adrenalin are examples of hormones which control?
- A. blood grouping
- B. tongue rolling
- C. behavioural patterns
- D. colour variation