<span>they have fossils and pieces of the environment from the past inside of them</span>
Characteristics of Lancelets:
Small
Elongated
Marine invertebrate
Lacks a jaw
No sense organs
Has a notochord
Example: Lamprey
Characteristics of Tunicates:
Marine invertebrate
Has an outer coat that is rubbery or hard
Has two siphons
Examples: sea squirts, salps
I hope this is the answer that you were looking for.
The appropriate response is C. Prokaryotes are unicellular life forms that need organelles or other interior film bound structures. In this manner, they don't have a core, be that as it may, rather, by and large have a solitary chromosome: a bit of roundabout, twofold stranded DNA situated in a territory of the phone called the nucleoid.