Question

which of the following characteristics provides for greater internal complexity in animals? blastula formation triploblastic gastrulation

Explanation:

• Blastula formation: A blastula is a hollow ball of cells formed during early embryonic development. It is a relatively simple stage and does not directly contribute to greater internal complexity.
• Triploblastic: Triploblastic animals have three germ layers - ectoderm, mesoderm, and endoderm. The mesoderm gives rise to a variety of structures such as muscles, bones, blood vessels, etc. This allows for the development of more complex internal organs and systems, increasing internal complexity.
• Gastrulation: Gastrulation is the process by which the blastula is transformed into a gastrula with different germ layers. While it is an important process for establishing germ layers, it is the presence of three germ layers (triploblastic condition) that leads to greater internal complexity rather than the process of gastrulation itself.

Answer:

triploblastic