1ST TERM EXAMINATION
SUBJECT: BIOLOGY CLASS: SSS 1 TIME:1 Hour 30 mins
SECTIONA: OBJECTIVES
INSTRUCTION: To each of the questions in Section “A” is provided four
options lettered (a) – (d); choose the one that is most appropriate to
each question. Answer all four (4) questions in Section “B”. All
questions carry equal mark(s) in each section.
1. Which of the following is a secondary host to tapeworm? (a) Man (b) Pig (c) water snail(d) dog
2. In which of the following are food grains best preserved? (a) silos (b) sacks (c) refrigerators (d)
baskets
3. Predators are beneficial in pest control because they (a) are natural enemies of small amounts (b)
devour farm animals (c) feed on pest of crops (d) compete for food with the pests
4. The study of the organisms and the environment of an abandoned farmland is the ecology of (a) a
community (b) an ecosystem (c) a habitat (d) a population
5. A sacchi disc is used in the determination of (a) rainfall (b) turbidity (c) waves (d) current velocity
6. Soil is said to be fertile if (a) it is black (b) it can supply usable nutrients to plants (c) the oxygen
content is added to it (d) the oxygen content is very high
7. An anemometer is an instrument for measuring (a) relative humidity (b) altitude (c) wind speed (d)
turbidity
8. Which of the following types of soil has the highest water-retaining capacity? (a) clay (b) loam (c)
sand (d) gravel
9. Water rises most rapidly in (a) sandy soil (b) clayey soil (c) sandy – loam soil (d) loamy soil
10. Soil with the finest particles is called (a) silt (b) clay (c) sand (d) loam
11. Which of the following world biomes is found in Nigeria? (a) Sahel savanna (b) Tundra (c) Desert
(d) Afro–alphine
12. A hygrometer is used for measuring (a) relative humidity (b) specific gravity (d) light intensity (d)
wind speed
13. Which of the following groups of factors is completely abiotic? (a) salinity, tide, plankton, turbidity
(b) temperature, pH, soil, insect (c) wind, altitude, humidity, light (d) conifers, pH, rainfall
14. Which of the following organisms will have the highest biomass? (a) small fish (b) tadpole (c) hawk
(d) phytoplankton
15. Which of the following groups consist of heterotrophs? (a) Mucor, Chlamydomonas and Euglena (b)
Spirogyra, Mucor and Mushroom (c) Man, Mucor and Mushroom (d) Man, maize and cowpea
16. An organism which lives on the remains of a dead plant is (a) parasite (b) commensals (c)
saprophytes (d) symbionts
17. In ecology, a community refers to (a) number of individuals of a given species (b) groups of different
organisms living in a habitat (c) groups of different organisms living in different habitat (d)
individuals of a habitat that can interbreed freely
18. The direction of wind is determined by (a) wind vane (b) anemometer (c) sacchi disc (d) barometer
19. Climatic factors affecting crop production include these except (a) soil pH (b) relative humidity (c)
wind (d) solar radiation
20. Which of the following components make up an ecosystem? (a) Decomposers, animals and non-
living factors (b) Living and non-living factors (c) Plants and non-living factors (d) Plants,
decomposers and non-living factors
21. The difference between a community and population is (a) a community is made up of organism of
the same species while a population is made up of organisms of different species (b) a community is
made up of populations of living organisms while a population is made up of organism of the same
species (c) an ecological niche does not exist in the community but it does in a population (d) a
community attracts competition but a population does not
22. Ecology simply means the study of (a) particular species of plants and animals (b) the
interrelationship between organism and their environment (c) the properties of a habitat (d) the
interrelationship between plants and animals
23. The following are abiotic components of the ecosystem except (a) bacteria (b) topography (c) water
(d) wind
24. Which of the following affects the presence of soil micro-organisms? (a) Soil structure (b) Soil pH
(c) Soil texture (d) Soil air
25. One of these organisms can help to fix nitrogen in leguminous plants; which? (a) Bacteria (b)
Termites (c) Rodents (d) Earthworm
26. Which of the following instruments would be most appropriate in comparing the air pressure at
different places in a habitat (a) hygrometer (b) barometer (c) photometer (d) air pressure disc
27. In a population, food shortage may lead to (a) an increase survival rate (b) high reproduction rate (c)
intra-specific competition (d) low rate of migration
28. Which of the following is a biotic component of an ecosystem? (a) Soil (b) Rainfall (c) Light (d)
Fungi
29. Which of the following is not classified as a terrestrial habitat? (a) Forest (b) Guinea savanna (c)
Afro-alpine (d) Littoral zone
30. The causative organism of sleeping sickness is the (a) Trypanosome (b) Plasmodium (c) Tsetse fly
(d) Penicillium
31. Which of the following are not causative organisms of plant diseases? (a) Fungi (b) Viruses (c)
Bacteria (d) Annelids
32. Which of the following methods is used in food preservation for a long period? (a) Adding oil to the
food (b) Keeping food in store (c) Warming food daily (d) Salting and drying the food
33. Which of the following is used in measuring the amount of moisture in the air? (a) Photometer (b)
Hydrometer (c) Anemometer (d) Hygrometer
34. An adult tapeworm has a very small head called (a) proglottids (b) scolex (c) rostellum (d) sucker
35. Which of the following world biomes can be found in Nigeria? (a) Sahel savanna (b) Tundra (c)
Temperate deciduous forest (d) Afro-Alphine
36. Predation is an example of a factor in an ecological system referred to as (a) edaphic (b) abiotic (c)
biome (d) biotic
37. Which of the following is odd one out? (a) Fleas (b) Leeches (c) Termites (d) plasmodium
38. The following conditions form the basis of competition in a habitat except (a) food (b) space (c) light
(d) body structure
39. Which of these factors doesnothinder population growth? (a) Food shortage (b) Emigration (c)
Abundance of food (d) Predation
40. Which of the following natural resources is mostly readily available to all organism? (a) Water (b)
Oil (c) Food (d) Air
41. Which of the following ecological factors causes food shortage? (a) Low rate of reproduction (b)
Emigration (c) Drought (d) Topography
42. Soil factors in an ecosystem are referred to as (a) topography (b) climatic (c) biotic (d) edaphic
43. All the available places on earth which supports life constitutes the (a) lithosphere (b) atmosphere (c)
biosphere (d) hydrosphere
44. In an ecosystem, the organism which changes light into stored chemical energy is the (a) consumer
(b) decomposers (c) producers (d) carnivores
45. Decomposers are important in nature because they (a) prevent the accumulation of dead organic
matter (b) make nutrient cycling possible (c) increase soil fertility (d) all of the above
46. Which of these is the vector for the transmission of sleeping sickness pathogen? (a) Tsetse fly(b)
House fly (c) Anopheles mosquitoes (d) Aphids
47. The following organisms are endoparasites but (a) planaria (b) liver fluke (c) tapeworm
(d) plasmodium
48. Which of the following organisms is a macro-organism found in the soil? (a) Termite (b) Bacteria (c)
Birds (d) Plasmodium
49. The following are nutritional diseases affecting farm animals except (a) rickets (b) brucellosis
(c) milk fever (d) osteoporosis
50. Newcastle disease affects majorly which of these animals? (a) Poultry (b) Cattle (c) Sheep (d) Pig
51. The study of organism and the environment of an abandoned farmland is the ecology of (a) a
community (b) a population (c) anecosystem (d) a habitat
52. The neck region of the tape worm, (taenia) is responsible for the (a) production of eggs (b) storage of
eggs (c) formation of new segment (d) development of the suckers
53. The complex relationship between the members of a community and between the community as a
whole and its physical environment is (a) ecosystem (b) habitat (c) niche (d) micro habitat
54. Flatworms and roundworms are said to be invertebrates because (a) they are small animals (b) they
can live inside the vertebrates (c) some of them are unicellular (d) they have no backbones
55. Each of the following is an arthropod except the (a) crab (b) spider (c) snail (d) millipede
56. A tapeworm has no alimentary canal because (a)it is autotrophic (b)it does not feed (c)its body
absorbs digested food (d)the suckers on the scolex suck blood
57. Which of the following are not causative organisms of plant diseases? (a) Fungi (b) Viruses (c)
Nematodes (d)Cercariae
58. The degree of fineness or coarseness of a soil sample is referred to as(a)soil structure(b)soil
texture(c) soil profile(d)soil pH
59. Which of the following diseases is not caused by a virus? (a) Rinderpest (b)Foot and mouth
disease(c) Newcastle diseases (d)Anthrax
60. The following research institutes are situated in Nigeria except(a)IITA(b)CRIN(c) NVRI (d)
NNMA
SECTION B:Theory
INSTRUCTION:Answer all questions.
1. (a) Define ecology. (1 mark)
(b) Explain the two (2) branches of ecology. (2 marks)
(c) Briefly explain five (5) ecological concepts. (5 marks)
(d) Mention two each of climatic factor and edaphic factor in an ecosystem. (2 marks)
2. (a) What is a parasite? (1 mark)
(b) Differentiate between a primary host and a secondary host. (1 marks)
(c) Differentiate between a population and community. (2 marks)
(d) State three (3) characteristics of a tapeworm. (3 marks)
(e) State three (3) characteristics of a swamp (3 marks)
3. (a) State four (4) economic important of liver fluke. (4 marks)
(b) On a map of Nigeria, locate the seven vegetation zones in Nigeria. Keys are very important.
(5 marks)
(c) Define a biome. (1 mark)
4. (a) Explain four (4) methods of food preservation. (4 marks)
(b) State three (3) causes of food wastage. (3 marks)
(c) Mention three (3) each of the plants found in tropical rain forest and savanna. (3 marks)
