Biology 2017 Jamb Examination
Biology 2017 Jamb Examination
Question 11
The possession of scales, laying of eggs with shells and bony structure of the head are characteristics shared by
Birds and reptiles share these characteristics: scales or scaly coverings, bony structures in the head, and egg-laying with shells. These features reflect evolutionary adaptations for protection, support, and survival in terrestrial environments.
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Question 12
The lungs of the lung fish is an adaptation for respiration _______?
Lungfish have lungs to allow gas exchange while in water, especially under low-oxygen conditions. This adaptation allows them to survive periods of drought or oxygen-poor water by breathing atmospheric air efficiently.
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Question 13
Which of the following is an example of active transport?
Active transport requires energy to move substances against their concentration gradient. Sodium reabsorption in the kidney is an active process facilitated by ATP-dependent sodium-potassium pumps, which maintain electrolyte balance and blood pressure.
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Question 14
The key event in the transition of the amphibians from water to land is the ________
Amphibians developed lungs to replace gills, allowing efficient oxygen exchange on land. This transition was crucial for terrestrial life, enabling amphibians to colonize land while maintaining some dependence on water for reproduction.
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Question 15
Erythrocytes are known as ________
Erythrocytes, or red blood cells, are specialized for transporting oxygen from the lungs to tissues and returning carbon dioxide to the lungs. Their biconcave shape and hemoglobin content optimize gas exchange and circulation efficiency.
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Question 16
The protista that is a producer in an aquatic food chain is
Chlamydomonas is a photosynthetic protist that produces organic compounds through photosynthesis. As a primary producer in aquatic ecosystems, it forms the base of the food chain and supports higher trophic levels.
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Question 17
Which scenario would cause a covalent bond to form?
Covalent bonds form when two atoms share electrons to achieve stable outer electron shells. This electron sharing results in a strong chemical bond that holds the atoms together within molecules.
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Question 18
The difference in structure, morphological and behavior of plant and animal is called
Variation refers to the differences in structure, morphology, and behavior among organisms of the same species. These differences arise from genetic, environmental, or developmental factors and are important for survival and evolution.
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Question 19
Use the diagram to answer the question that follows: The structure is adapted for
The diagram shows teeth adapted for omnivores, which require a combination of sharp and flat teeth to consume both plant and animal matter. The structure reflects dietary versatility and functional specialization.
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Question 20
The product after the union of the male and female gamete in animals is called
When male and female gametes fuse during fertilization, they form a zygote. The zygote is the first developmental stage of a new organism, carrying genetic information from both parents and initiating embryonic development.
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Choose the option opposite in meaning to the word blight.
It is important not to let mistakes blight your life
| N | N | |
|---|---|---|
| Capital 8000 | Plant and machinery 5000 | |
| Net profit 4000 | Motor van 4500 | |
| Drawings 200 | Stock 2000 | |
| Creditors 2000 | Debtor 1000 | |
| Accruals 300 | Bank 100 | |
| Cash 600 | ||
| 14100 | 14100 |
_______ deceitfully took 150 pounds of silver in two bags and two changes of clothes against the wish of his master.
12 persons can do a piece of work in 4 days. How many persons are required to complete 8 times the work in half the time ?