OBJECTIVES
1. Plants with breathing roots are characteristic features of vegetation in
A. Tropical grassland. B. temperate grassland. C. salt water swamp. D. tropical rain forest.
2. Most tropical plants shed their leaves during dry weather conditions in order to
A. reduce their growth rate. B. conserve water. C. reduce competition. D. minimize the rate of photosynthesis.
3. The rate of decomposition of organisms is faster in the tropical rain forest than in other biomes because
A. of the relatively constant daylight. B. there are more plants per square feet. C. of abundance of water. D. of constant cool temperature.
4. The following habitats can be found in West Africa except
A. mangrove swamp. B. Sahel savanna. C. savanna grassland. D. temperate grassland
5. 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 epiphysis and climbers. C. Annual rainfall is less than 100 cm. D. Interior has low light intensity, high humidity and damp floor.
6. The following are features of the tropical rain forest except
A. abundant water supply. B. loose and moist soil. C. short trees growing beneath tall trees. D. scanty trees with small leaves.
7. The following are features of Northern Guinea Savannah except
A. presence of tall trees with thick bark. B. bare soil with very few tree. C. presence of fire- resistant tree. D. D. abundant herbivores.
8. Trees in savannah habitats usually have heavy thick bark which mainly
A. reduces the rate of transpiration. B. protect them from the scorching sun. C. protect them from heavy winds. D. resist bush fires.
9. Which of the following is not a characteristic feature of tropical rainforest habitat?
A. Trees with longer boles than those in savannah. B. Fewer canopy strata than the savannah. C. Many more trees and climbers than savannah. D. Plenty of leaf litter on the ground.
10. Northern Guinea savannah is associated with
A. abundant rainfall. B. abundant trees and shrubs. C. soil with very little plant cover. D. abundant grasses.
11. How are Savannah plants protected from bush fires? They
A. have sunken stomata. B. roll their leaves during hot days. C. have thick barks. D. shed their leaves gradually throughout the year.
12. Very low annual rainfall, sparse vegetation, high day temperatures and cold nights are the characteristics of the biome known as
A. swamp. B. tropical forest. C. southern guinea savannah. D. desert.
13. Breathing roots are characteristic structures of plants growing in
A. mangrove swamp. B. desert. C. shrub biome. D. savannah.
14. The possession of breathing roots is a characteristic of plants growing in
A. mangrove swamp. B. coastal savannah. C. guinea savannah. D. shrub biome.
15. Fewer number of trees is characteristic of the Savannah zones of Nigeria because
A. here is too much sunlight. B. here is limited amount of rainfall. C. they are usually exposed to grazing animals. D. they are covered by high mountains.
16. Possession of strong adhesives is a feature of animals living in/on
A. sandy beaches. B. rocky shores. C. benthic zones. D. deserts.
17. A habitat with low rainfall, very low humility, exposed soil with little plant cover, few trees and shrubs is likely to be
A. a rain forest. B. a mangrove forest. C. a desert. D. a swamp.
18. Which of the following world biomes is found in Nigeria?
A. Sahel Savannah. B. Tundra. C. Desert. D. Afro-alpine vegetation.
19. The presence of stilt and breathing roots are features of plants found in the
A. tropical rain forests. B. fresh water swamp forest. C. mangrove forest. D. southern guinea savannah.
20. Which of the following is characteristics of a swamp?
A. Vegetation with stratified arrangement. B. Mesophytes with broad leaves. C. The ground is flooded most of the time. D. Predominance of climbing plants.
21. Desert plants are usually called
A. hydrophytes. B. mesophytes. C. xerophytes. D. sporophytes.
22. Which of the following factors is the main problem facing xerophytes?
A. Conservation of excess water. B. Competition for sunlight.C. Lack of adequate water. D. Poor formation of roots.
23. The rate of decomposition of dead organisms is faster in the tropical rainforest than in other bionics because
A. of consistent cool temperature. B. of the relatively constant daylight. C. there are more plants. D. of availability of moisture.
THEORY
1. (a) Describe the characteristic features of the vegetation of the tropical rain forest. (b) Name two types of savanna found in Nigeria giving one example in each case of a town where they occur.
2. List five morphological features that are characteristic of plants found in Tropical rainforest. State function of the features listed above to the plant.
3. Give a brief description of the characteristics of the Northern Guinean Savannah.
4. List four characteristics each of: (a) Trees of the Tropical Rain Forest (b) Trees/shrubs of the Savannah.
5. State five important uses of water to organisms the tropical rain forest.
6. Name three plants and two animals found in savannah vegetation.
7. Name two local biotic communities in Nigeria and associate each type with a particular state in Nigeria.
