Answer the following question given this paragraph: 

Lancelets are invertebrate chordates that retain all four defining chordate traits as adults. There are only about 25 species of living lancelets. Lancelets resemble tunicates in several ways. For example:.


Q: What are invertebrate chordates that retain all four defining chordate traits as adults called?

 Choices:

- vertebrates

- sporozoans

- tunicates

- lancelets

A:
lancelets
