Subphylum Cephalochordata

Question 1

Lancelets

Answer 1

Small fish-like animals that are generally less than 5cm in length, although some reach 6 to 9 cm

Question 2

Characteristics Of Cephalochordata/Lancelets

In terms of habitat
In terms of shape
In terms of notochord, nerve cord, gill slits and post anal tail
In terms of cilia & pharyngeal slits
In terms of gas exchange

Answer 2

They occupy warm, swallow marine habitats where they are mostly buried in sand.
They are known as lancelets because of their blade like shape
The notochord, dorsal hollow nerve cord, numerous gill slits and post anal tail persists into the adult stage
Lancelets use cilia to draw food laden water through hundreds of pharyngeal slits.
Gas exchange occurs across the skin