Biology 2016 Jamb Examination
Biology 2016 Jamb Examination
Question 41
Which of the following is an agent of a sexually transmitted disease?
Treponema pallidum is a bacterium that causes syphilis, a sexually transmitted disease transmitted primarily through sexual contact, affecting multiple organ systems if untreated.
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Question 42
Which of the following animals has homodont dentition?
Homodont dentition refers to having teeth that are all of the same type, shape, and function. Lizards exhibit this characteristic, unlike mammals which typically have heterodont dentition.
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Question 43
The movement of blood between the heart and all other parts of the body besides the lung is known as
Systemic circulation is the portion of the cardiovascular system that carries oxygenated blood from the heart to the body and returns deoxygenated blood back to the heart, maintaining nutrient and gas transport.
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Question 44
If the cross of a red-flowered plant with a white flowered plant produces a pink flowered plant, this is an example of
Incomplete dominance occurs when the heterozygote displays a phenotype that is intermediate between the two homozygotes, such as the pink flower resulting from red and white parental flowers.
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Question 45
When a cell is placed in solution and the size of the cell increases, the concentration of solution is said to be
A hypotonic solution has a lower solute concentration compared to the cell cytoplasm, causing water to move into the cell by osmosis and resulting in cell swelling or turgidity.
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Question 46
Which of the following plant hormone is responsible for ripening of fruits?
Ethylene is a gaseous plant hormone that regulates fruit ripening, leaf abscission, and other developmental processes by activating specific gene expression in plant tissues.
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Question 47
The ability of a living organism to detect and respond to changes in the environment is referred to as
Irritability is the capacity of an organism to sense stimuli from its environment and respond accordingly. This is a fundamental characteristic of life, allowing adaptation and survival.
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Question 48
An example of an endospermous seed is
Endospermous seeds, like maize, contain a significant amount of endosperm which serves as a nutrient source for the developing embryo, unlike non-endospermous seeds like beans.
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Question 49
Which of the following theories was NOT considered by Darwin in his evolutionary theory?
Darwin's theory of evolution included natural selection, variation, and competition, but the theory of use and disuse was proposed by Lamarck, not Darwin.
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Question 50
Which of the following conditions is NOT necessary for photosynthesis to take place?
Photosynthesis requires chlorophyll, light, and Carbon(IV)oxide ($CO_2$) to produce glucose and oxygen. Carbon(II)oxide ($CO$) is toxic and does not participate in photosynthesis, making it unnecessary.
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All European countries are seeking to diminish the check upon individual ____ which state examinations with their ____ growth have bought in their train.
Given:
(i) Cost price (ii) Selling price (iii) Cost plus fixed percentage (iv) Price above cost and selling price
From the information above, the prices used in charging goods to the branches are?