Question

humans and apes have five fingers they can use to grasp objects. which type of structure is described?
a vestigial structure
b homologous structure
c analogous structure

Explanation:

To determine the structure type:

• Vestigial structures are reduced/non - functional (e.g., human appendix), so option a is incorrect.
• Homologous structures are similar in structure (and often origin) but may have different functions. Humans and apes share a common ancestor, and their five - fingered grasping structures are similar in structure (due to common ancestry), fitting homologous structures.
• Analogous structures have similar functions but different origins (e.g., bird and insect wings), so option c is incorrect.

Answer:

b. homologous structure