Select the two main groups of protostomes.Multiple select question.ecdysozoanslophotrochozoanscnidariansechinodermsbilaterians

Identifying the Main Groups of Protostomes

1. Understanding Protostomes: Protostomes are a major group of animals characterized by their developmental process, where the mouth forms before the anus during embryonic development. They are divided into several groups.

2. Main Groups of Protostomes: The two main subgroups of protostomes are:

   • Ecdysozoans: This group includes animals that molt their exoskeletons, such as arthropods and nematodes.
   • Lophotrochozoans: This group comprises animals that have a lophophore (a feeding structure) or go through a trochophore larval stage, including mollusks, annelids, and others.

3. Other Groups:

   • Cnidarians (e.g., jellyfish, corals) and echinoderms (e.g., starfish, sea urchins) are not considered protostomes; they fall under different classifications (Cnidaria and Echinodermata).
   • Bilaterians is a broader term that includes both protostomes and deuterostomes.

Final Answer

The two main groups of protostomes are Ecdysozoans and Lophotrochozoans.