Question

question 7
1 pts
unused structures in organisms that do not have functions are called ____________.
vestigial structures
adaptations
homologous structures
residual structures

Explanation:

Vestigial structures are remnants of organs or structures that had a function in an early ancestor. Adaptations are traits that enhance an organism's survival and reproduction. Homologous structures are similar in structure due to common ancestry but may have different functions. Residual structures is not a standard biological term for this concept.

Answer:

vestigial structures