61.An association between two organisms where both members benefit is known as ___
- A. symbiosis
- B. commensalism
- C. ammensalism
- D. mutualism
62.An instrument used in measuring the speed of wind is
- A. a barometer
- B. a wind gauge
- C. a wind vane
- D. an anemometer
63.At times hyenas feed on remains of animals killed by other animals. At other times, hyenas themselves kill animals for food. Therefore hyenas may best be described as ––
- A. scavengers and herbivores
- B. scavengers and parasites
- C. scavengers and predators
- D. herbivores and predators
64.Autecology is defined as the study of interrelationship of
- A. many species of organisms and their environment
- B. same species of organisms and their environment
- C. organisms in the atmosphere.
- D. organisms under the earth’s surface
65.Autotrophs are also described as ––
- A. Consumers
- B. Decomposers
- C. Carnivores
- D. Producers
66.If three 30cm lengths of glass tubing are tightly packed with clay, sand and loamy soils respectively and then stood in a beaker of water for one week the level of water will be
- A. Lowest in the tube with clay
- B. The same in all the tubes
- C. Lowest in the tube with loamy soil
- D. Lowest in the tube with sandy soil
67.In a community bacteria and fungi are referred to as ––
- A. producers
- B. consumers
- C. scavengers
- D. decomposers
68.Puddles, Ponds, Rivers, Seas and Oceans are grouped together as ––
- A. Ecosystem
- B. Biosphere
- C. Aquatic habitat
- D. Terrestrial habitat
69.The feeding pattern in an ecosystem is called…………..
- A. Pyramid of energy
- B. Food web
- C. Food chain
- D. Pyramid of member
70.The orderly changes that occur slowly and naturally in plant and animal communities in a given area over a period of time until a stable community is established is called ––
- A. Transformational change
- B. ecological succession
- C. survival of the fittest
- D. weather change
71.The sign + is used to indicate an association where an organism gains, while 0 is used where an organism is unaffected. An association indicated as +0 is known as ––
- A. predation
- B. commensalism
- C. parasitism
- D. competition
72.The sum total of all the roles an organism plays in a habitat is referred to as
- A. ecology
- B. ecosystem
- C. habit.
- D. niche
73.Which of the following factors does not control population growth?
- A. Food shortage
- B. Emigration
- C. Predation
- D. Abundance of food
74.Which of the following statements best describe an ecosystem?
- A. A place where living organisms can live successfully
- B. The interactions between living organism in a habitat and the non-living part of the environment
- C. A biological association between a plant and an animal
- D. A system of grouping organisms in a habitat
75.Which of these represents a correct food chain in nature?
- A. Crustacea → diatom →fish → man
- B. Diatom → crustacea → fish → man
- C. Fish → crustacea → man → diatom
- D. Diatom → fish → crustacea → man
76.___________ is involved in the mechanism of expelling water from the protozoans during the process of____________
- A. Contractile vacuole, Osmoregulation
- B. Contractile vacuole, Phagocytosis
- C. Food vacuole, Ultrafilteration
- D. Food vacuole, Pinocytosis
77.______________ is used for photosynthesis in Euglena sp.
- A. Reservoir
- B. Nucleus
- C. Chloroplast
- D. Paramylon granule
78.A heart with four chambers is found in______________
- A. Fishes
- B. Insects
- C. Snails
- D. Rats
79.Animal cell does not have a ____________
- A. Membrane
- B. Nucleolus
- C. Food Vacuole
- D. Cell wall
80.Beriberi is caused by deficiency of vitamin_____________