Evolution - Vestigial Structures

Question 1

homologous structures

Answer 1

• structures that have different mature forms but develop from the same embryonic tissue
• ex. forearm of reptiles, birds and mammals
• these organisms are using similar body plans

Question 2

vestigial organs

Answer 2

• organ or structure that serves no useful function in an organism
• ex. pelvis and femur located in the tail of a whale
• tell us that these animals have ancestors that lived on land and had four legs
• ex. humans have appendix that use to help us process a rare meat diet