Thylakoid: each of a number of flattened sacs inside a chloroplast, bounded by pigmented membranes on which the light reactions of photosynthesis take place
homologous structure: is an organ or body part that appears in different animals and is similar in structure and location doesn't always necessarily share the same purpose.
homologous structure: is an organ or body part that appears in different animals and is similar in structure and location doesn't always necessarily share the same purpose
convergent evolution is the process whereby organisms not closely related independently evolve similar traits as a result of having to adapt to similar environments or ecological niches
Evolution:the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth