Assertion: algae's cell wall | /r/MadeOf | starch
Facets:
value: as an energy-storing compound
type: PURPOSE
Source sentences:
text: Volvox cells and their cousin chlamydomonas contain features in common with more complex plants such as cell walls made of cellulose, starch as an energy-storing compound, and chloroplasts, suggesting these protists may have evolved into modern-day plants.