Year :
2011
Title :
Biology
Exam :
WASSCE/WAEC MAY/JUNE
Paper 1 | Objectives
41 - 50 of 59 Questions
| # | Question | Ans |
|---|---|---|
| 41. |
The falling off of leaves of deciduous trees is helpful to the plant because it A. reduces the rate of transpiration B. enables the plant to conveniently eliminate its excretory products C. enables the plant to bear more fruits D. ensures that the limited mineral salts get to only growing regions |
A |
| 42. |
A sample of wet garden soil of known weigh was heated to constant weight. The loss of weight is due to loss of A. water B. organic matter C. water and organic matter D. water and inorganic matter |
C |
| 43. |
Assuming that a period of stable population size is followed by a period when natality increases by ten (1O) per cent and immigration increases by twenty (20) percent of population size. The population size will A. be at equilibrium B. increase by forty (40) per cent C. begin to increase D. begin to decrease |
C |
| 44. |
Which of the following methods does not make water fit for drinking? A. Addition of chlorine B. Boiling C. Distillation D. Addition of alum Detailed SolutionChlorine is one of the most commonly used disinfectants for water disinfection. Addition of Chlorine helps to kill certain bacteria and other microbes in tap water |
|
| 45. |
Vaccination results in A. aiding red blood cells to carry more oxygen B. production of antibodies which destroy toxins of germs C. arresting excessive bleeding D. production of white blood cells which engulf and digest bacteria. |
B |
| 46. |
Leguminous crops are incorporated into crop rotation in order to A. improve aeration of the soil. B. promote nitrogen fixation C. increase the rate of soil formation D. improve upon the water holding capacity of the soil |
B |
| 47. |
Which of the following practices improves crop yield in a clayey soil? Addition of A. more water and humus B. lime and humus C. fertilizers D. weedicides and fertilizers |
B |
| 48. |
Which of the following activities promotes forest conservation? A. Lumbering B. Use of firewood for cooking C. Afforestation D. Production of paper |
C |
| 49. |
Which of the following statements is not true about continuous variation? It A. is usually controlled by several genes B. can be influenced by environmental factors C. follows a normal distribution curve D. is usually controlled by one or two pair(s) of genes |
D |
| 50. |
Acquired characters are A. received from parents B. passed to offspring C. caused by the environment D. caused by mutation |
C |
| 41. |
The falling off of leaves of deciduous trees is helpful to the plant because it A. reduces the rate of transpiration B. enables the plant to conveniently eliminate its excretory products C. enables the plant to bear more fruits D. ensures that the limited mineral salts get to only growing regions |
A |
| 42. |
A sample of wet garden soil of known weigh was heated to constant weight. The loss of weight is due to loss of A. water B. organic matter C. water and organic matter D. water and inorganic matter |
C |
| 43. |
Assuming that a period of stable population size is followed by a period when natality increases by ten (1O) per cent and immigration increases by twenty (20) percent of population size. The population size will A. be at equilibrium B. increase by forty (40) per cent C. begin to increase D. begin to decrease |
C |
| 44. |
Which of the following methods does not make water fit for drinking? A. Addition of chlorine B. Boiling C. Distillation D. Addition of alum Detailed SolutionChlorine is one of the most commonly used disinfectants for water disinfection. Addition of Chlorine helps to kill certain bacteria and other microbes in tap water |
|
| 45. |
Vaccination results in A. aiding red blood cells to carry more oxygen B. production of antibodies which destroy toxins of germs C. arresting excessive bleeding D. production of white blood cells which engulf and digest bacteria. |
B |
| 46. |
Leguminous crops are incorporated into crop rotation in order to A. improve aeration of the soil. B. promote nitrogen fixation C. increase the rate of soil formation D. improve upon the water holding capacity of the soil |
B |
| 47. |
Which of the following practices improves crop yield in a clayey soil? Addition of A. more water and humus B. lime and humus C. fertilizers D. weedicides and fertilizers |
B |
| 48. |
Which of the following activities promotes forest conservation? A. Lumbering B. Use of firewood for cooking C. Afforestation D. Production of paper |
C |
| 49. |
Which of the following statements is not true about continuous variation? It A. is usually controlled by several genes B. can be influenced by environmental factors C. follows a normal distribution curve D. is usually controlled by one or two pair(s) of genes |
D |
| 50. |
Acquired characters are A. received from parents B. passed to offspring C. caused by the environment D. caused by mutation |
C |