Biology 2012 Jamb Examination
Biology 2012 Jamb Examination
Question 1
Which of the following is most advanced in the evolutionary trend of animals?
Cockroach is an insect with a segmented body, legs, and wings in some species, along with a more complex nervous and circulatory system. These features make it more advanced in evolutionary development than liverflukes, earthworms, or snails.
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Question 2
The largest number of cassava plants has an approximate height of.
The graph shows the distribution of cassava plant heights. The tallest bar corresponds to 1.6m, indicating that the largest number of cassava plants in the field are approximately 1.6 meters tall.
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Question 3
The type of interaction shown is referred to as.
Â
Â
The diagram shows two different species competing for the same resources. This type of interaction is interspecific competition, where organisms of different species vie for limited resources such as food or space in an ecosystem.
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Question 4
In the diagram, which of the following statements is true of the interaction.
The diagram illustrates competitive exclusion where one species outcompetes the other. P. aurelia and P. caudatum cannot coexist indefinitely in the same environment because one will eventually dominate and displace the other.
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Question 5
Use the diagram below to answer this question. The function of the part labelled lll is to.
Part lll in the diagram is the ovary. It produces egg cells (ova) in females and is also responsible for releasing hormones that regulate reproductive cycles, preparing the body for fertilization and pregnancy.
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Question 6
Use the diagram below to answer this question. The graph illustrates.
The graph shows distinct height categories with clear gaps between them. This indicates a discontinuously varying character, where the trait occurs in separate, non-overlapping classes instead of a continuous spectrum.
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Question 7
Use the diagram below to answer this question. The organelle responsible for heredity is labelled.
Label ll represents the nucleus, which contains the cell's DNA and is responsible for heredity. It controls genetic information, determining traits and characteristics passed from parent to offspring.
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Question 8
Use the diagram below to answer this question. Arrows represent directional movement materials. Transportation in the xylem is represented by.
Arrow IV represents the movement of water and dissolved minerals from the roots to the leaves through xylem vessels. This upward transport is essential for hydration, photosynthesis, and nutrient distribution in plants.
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Question 9
Use the diagram below to answer this question. Arrows represent directional movement materials. The arrow labelled ll represents the.
Arrow ll indicates oxygen being released from the leaf during photosynthesis. Oxygen is a byproduct that exits through stomata while sugars are transported through phloem, showing the leaf's role in gas exchange and energy production.
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Question 10
Use the diagram below to answer this question. The developing embryo is usually contained in the part labelled.
Part II in the diagram represents the ovule inside the ovary. The ovule houses the developing embryo after fertilization and provides nutrients and protection until it matures into a seed ready for dispersal.
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