Question Detail
Question
Which germ layer is uniquely present in triploblastic animals but absent in diploblastic animals?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The 'Additional Important Notes' section, under 'Germ layers', states: 'Diploblastic - ectoderm and endoderm (cnidarians). Triploblastic - ectoderm, mesoderm, endoderm (all higher animals).' This indicates that the mesoderm is the additional layer in triploblastic organisms.
Hint
Compare the number and names of germ layers in diploblastic versus triploblastic organisms.