AP BIOLOGY

EVOLUTION

EVIDENCE FOR EVOLUTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are the most important characteristics of analogous structures?
A
Structures that perform the same function
B
Structurally different
C
Structurally the same
D
Structures that perform different functions
Explanation: 

Detailed explanation-1: -With the help of Convergent Evolution, the common traits developed in the species. These are the structures that perform similar functionality. But these structures are not similar from the Anatomical viewpoint. This means these have different anatomical structures.

Detailed explanation-2: -Analogous structures have different ancestry, but the same function. These can be thought of in terms of the literary device of “analogy, ” where two different things are compared based on their similarities. Homologous structures have the same ancestry, but may no longer serve the same function.

Detailed explanation-3: -Analogous structures are features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature (compare to homologous structures) and which evolved in response to a similar environmental challenge.

Detailed explanation-4: -Structures with similar anatomy, morphology, embryology and genetics but dissimilar functions are known as homologous structures. Structures that are superficially similar but anatomical dissimilar doing the same function are known as analogous structures.

Detailed explanation-5: -Structures that evolve in living organisms that share a common ancestor are known as homologous structures. Analogous structures are those that have evolved separately in different living organisms yet function similarly or identically.

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