What are Structures that have different mature forms but develop from the same embryonic tissue called?

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

The energy available as a result of the motion of a body is called energy. -potential -gravitational -kinetic -chemical

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry