Question

1. what makes analogous structures different from homologous structures?

they are always smaller than other structures
they have similar functions but evolved independently, not from a common ancestor
they are only found in fossils
they stop working as an organism grows older

Explanation:

To determine the difference between analogous and homologous structures:

• Homologous structures are inherited from a common ancestor (similar structure, may differ in function).
• Analogous structures: different species develop similar functions (e.g., wings in insects and birds) independently, with no common ancestral structure for that function.
• Option 1: Size isn’t a defining difference.
• Option 3: Analogous structures exist in living organisms, not just fossils.
• Option 4: Structures don’t “stop working” due to being analogous/homologous.

Only option 2 matches the definition of analogous structures.

Answer:

B. They have similar functions but evolved independently, not from a common ancestor