Question 1 of 20 5,032 total questions
Maize is best stored against insect attack
A on raised platforms
B in fumigated silos
C in a sunny area
D while still on the cob
E in humid metal tanks
Which of the following methods is used in food preservation for a long period?
A adding oil to food
B Exposing food to fresh air
C keeping the food in a store
D Warming the food daily
E Salting and drying the food
Which of the following. groups of organisms feeds directly on green plants?
A Producer
B Decomposer
C Primary consumer
D Secondary consumer
E Tertiary consumer
The activities of an organism which affect the survival of another organism in a habitat can be described as
A biotic factors
B climatic factors
C physiographic factors
D edaphic factors
E abiotic factors
Pests can be controlled without the subsequent danger of polluting the ecosystem by
A introducing a population of species similar to that of the pest
B increasing the population of the natural enemies of the pest
C eliminating the natural enemies of the pest
D keeping the population of natural enemies of the pest constant
E spraying the ecosystem with pesticide
Which of the following statements is not correct about the ecological effects of agricultural activities?
A The use of herbicides and pesticides in farms can cause pollution
B Bush-burning encourages desertification
C Excessive use of fertilizers in farms may have harmful effects
D Tillage of tropical soils with ploughs and harrows may encourage erosion
E Monocropping is one of the cultural methods of controlling pests.
Which of the following characteristics is associated with commensalism?
A Both organisms are harmful to each other
B The association involves many organisms
C The association is beneficial to one of the organisms
D Both species are beneficial to each other
E This relationship is found only among higher plants
Which of the following statements is not correct about food chains?
A All food chains start with a green plant
B Food chains involve feeding relationships among organisms
C horter food chains indicate more effective utilization of energy than longer ones
D There is no energy loss in a food chain
E All food chains have primary consumers.
An association between living organisms in which one lives on and feeds at the expense of the other
A parasitism
B commensalism
C mutualism
D symbiosis
E predation
The translocation of food materials in plants takes place in the
A xylem
B cambium
C phloem
D parenchyma
E sclerenchyma
A dehiscent fruit formed from several fused carpels with many seeds is classified as
A an achene
B a capsule
C a follicle
D a legume
E a nut
Which of the following is not an adaptation of the small intestine for absorption of digested food? The
A villi are well supplied with blood and lymph vessels
B villi are numerous and thin-walled
C small intestine has large surface area
D small intestine is long and coiled
E small intestine leads into the large intestine
In photosynthesis, the following processes are part of the light reaction
A transfer of radiant energy which reduces a co-factor
B absorption of radiant energy by chlorophyll
C utilization of the energy in the electron transfer chain to form ATP
D formation of glucose using energy from NADPH
E splitting of water into its component parts.
Autotrophs are also described as
A consumers
B decomposers
C carnivores
D producers
E herbivores
The aqueous humour is represented by the part labelled
The greatest concentration of light receptors is found in the part labelled
The light - sensitive layer is labelled
Which of the following organisms is at the tissue level of organization?
A Euglena
B Paramecium
C Volvox
D Hydra
E Chlamydomonas.
The bone that articulates with the part labelled III is the
A humerus
B femur
C tibia
D sacrum
E fibula
The part labelled I is the
A lumbar
B sacrum
C ilium
D pubis
E coccyx
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