    ~ Sentence...1: Vendobionta’ lived during  which period? :    Sentence. 2: They suggested’ that  Stromateveris was’ an evolutionary "aunt"  of ctendphores, and that. clenophores  Originated: from. sessile animals : whose  descendants -became ‘swimmers » ‘and  changed’ the’ cilia . from a. feeding  mechanism to a propulsion system.