A significant difference in the appearance of the two sexes within a species is called a(n)

and is often the result of sexual selection.

Question

A significant difference in the appearance of the two sexes within a species is called a(n) 
 
 and is often the result of sexual selection.

BlackTom AI · Accepted Answer

In this question, we’re asked to identify the term that describes a significant difference in appearance between males and females of the same species, noting that this difference is often the result of sexual selection.
Option 1: sexual dimorphism. This is the correct term for differences in secondary sexual characteristics (such as size, color, or ornamentation) between the sexes within a species. These differences arise through evolutionary processes, frequently driven by sexual selection as a selective force, leading to dimorphic traits.
Option 2: sexual selection. While sexual selection explains why such differences may evolve (it’s the mechanism behind why certain traits are favored to attract mates or compete with rivals), it is not the term for the difference itself. Calling the appearance difference by this label would describe the process rather than the phenomenon, making it an incorrect choice for the blank.
To summarize, the phrase that names the observable difference is sexual dimorphism, whereas sexual selection is the underlying evolutionary process that can produce that difference. The problem presents one blank in the sentence, so the appropriate fill to complete the description is sexual dimorphism; sexual selection would answer a different aspect of the question if prompted for the mechanism.

A significant difference in the appearance of the two sexes within a species is called a(n) and is often the result of sexual selection.未知题型

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