What are structures that have the same shape/form, but are used differently?

Twin structures
Analagous structures
Vestgial structures
Homologous structures

Question

What are structures that have the same shape/form, but are used differently?
 	
	Twin structures
	Analagous structures
	Vestgial structures
	Homologous structures

ashash146 · Answer

If you look at all the options, then you'll see that Homologous structures would be the correct choice. Homo, the prefix of the word, means "same." In the question, it's asking for the same shape/form. 

The answer is D. Homologous structures