The three germ layers , namely ectoderm, endoderm and mesoderm are found in
A. All the chordates only
B. All the chordates except the protochordates
C. All the chordates and higher invertebrates
D. Higher chordates and higher invertebrates
Answer:A
The three germ layers , namely ectoderm, endoderm and mesoderm are found in
A. All the chordates only B. All the chordates except the protochordates C. All the chordates and higher invertebrates D. Higher chordates and higher invertebrates