Question

Diploblastic and triploblastic are terms that describe

• A. the number of invaginations during embryonic development
• B. the number of heads during embryonic development
• C. the number of germinal layers during embryonic development
• D. the number of cell types during development

Answer 1

Answer: (C)

the number of germinal layers during embryonic development

Diploblastic animals have two germinal layers (ectoderm and endoderm) during embryonic development, e.g., poriferans. Triploblastic animals have three germinal layers (ectoderm, mesoderm and endoderm) during embryonic development, e.g., platyhelminthes.

Hence the correct option is C.