Waec 2008 Biology Past Questions And Answers
Filaments of Spirogyra placed in a beaker of water in a dark cupboard died because
- A. the filaments could not photosynthesize
- B. conjugation could not take place
- C. the temperature was too high
- D. the plant was overflooded
Shrubs do not survive on newly weathered soils because
- A. the top soil is shallow
- B. drainage on such soil is poor
- C. humus is absent from the soil
- D. the soil tends to be sandy
The impedance of the concentration of chloroplast in the palisade layer of the leaf is for maximum exposure to
- A. carbon dioxide
- B. light
- C. water
- D. oxygen
What would be the effect of taking the lion out of the web?
- A. The number of organisms at each trophic level would increase
- B. Man would occupy the apex of the web
- C. There would be more rabbit in the web
- D. The energy reaching the remaining trophic would be increase
(a) Explain the following modes of nutrition which occur in plants:
(i)Autotrophic
(ii) Chemosynthetic
(iii) Carnivorous
(b) Give one example each of a plant which undergoes the modes of nutrition listed in (a) above.
(c) (i) Describe three ways by which nitrogen is added to the soil for plant use.
(ii) State two ways by which nitrogen is lost from the soil.
View Discussion (0)WAEC 2008 THEORYA community is best described as
- A. living things in a habitat interacting with the non-living part of the environment
- B. the total number of individuals of one species of organisms living in a particular habitat
- C. populations of different species living together and interacting with each other in one habitat
- D. the individuals of a particular group living together in an area and sharing the same resources
(a) What is transpiration?
(b)(i) Name two types of transpiration
(ii) List two factors which affect the rate of transpiration.
(c) Describe the mechanisms of opening and closing of the stomata.
(d) State:
(i) two similarities and (ii) two differences between transpiration and sweating.
View Discussion (0)WAEC 2008 THEORYWhich of the following instruments is used to measure wind speed?
- A. Thermometer
- B. Barometer
- C. Hygrometer
- D. Anemometer
The eyes can properly focus images of objects of various distances on the retina by a process called
- A. refraction
- B. reflection
- C. accommodation
- D. correction
Many diseases caused by bacteria can be treated and cured by using
- A. antiseptics
- B. antibiotics
- C. antigens
- D. antibodies