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Practice Reading: Multiple Choice, Single Answer ID: #4379 Phenomenon
Instructions ›
Read the text and answer the multiple-choice question by selecting the correct response. Only one response is correct.
Sequential hermaphroditism is an evolutionary process in which a creature changes sex during its life cycle. The phenomenon is well documented by biologists who have observed its occurrence in nearly thirty species of fish. Many scientists explain this adaptive change as an example of the size-advantage model which, in some species, links an individual's size with its probability of producing offspring. In species where mating rituals require males to fight for female partners, for example, there is an overall reproductive advantage if an individual is female when young and small, but becomes male as it grows larger and more competitive.

What does the writer say about sequential hermaphroditism?

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Result:

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Option 2: "It can lead to more fish being born."

Explanation: The text explains that sequential hermaphroditism is linked to the size-advantage model, which suggests that changing sex can enhance reproductive success. This implies that more fish can be born as a result of this adaptive change, particularly when individuals maximize their reproductive potential based on size.

Option 1: "It is most common in female fish."

Explanation: The text does not state that sequential hermaphroditism is most common in female fish. Instead, it discusses how individuals change sex based on size and competitive advantage, without indicating a predominance of females.

Option 3: "It is an important part of the mating ritual."

Explanation: While the text mentions mating rituals, it does not state that sequential hermaphroditism is an important part of these rituals. Instead, it focuses on the reproductive advantages linked to size and sex change.

Option 4: "It can cause increased competitiveness in males."

Explanation: The text suggests that becoming male as an individual grows larger can provide a reproductive advantage, but it does not claim that sequential hermaphroditism itself causes increased competitiveness in males. The focus is on the adaptive benefits of changing sex rather than on competitiveness alone.

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