Which group has segmented parts, a complete digestive tract, and includes earthworms?Group of answer choicesCnidariansMolluscsFlatwormAnnelidsEchinoderms

Break Down the Problem

1. Identify the key characteristics mentioned: segmented parts, complete digestive tract, and includes earthworms.
2. Examine each group of organisms provided in the answer choices to see which one fits all the criteria.

Relevant Concepts

• Segmented Parts: Refers to organisms that have body divisions.
• Complete Digestive Tract: Indicates that the organism has a digestive system with a mouth and an anus, allowing for a continuous flow of food.
• Earthworms: These are specific organisms known to belong to a particular group of animals.

Analysis and Detail

1. Cnidarians: These are primarily radially symmetrical animals such as jellyfish and corals, which have a simple digestive system (incomplete).
2. Molluscs: A diverse group that includes snails, clams, and squids; they do have a complete digestive tract, but they are not segmented.
3. Flatworms: These are acoelomate and lack segmentation; they have an incomplete digestive system.
4. Annelids: This group includes segmented worms like earthworms. They have a complete digestive system and are characterized by their segmented bodies.
5. Echinoderms: This group includes starfish and sea urchins; they have a unique radial symmetry and possess a water vascular system but are not segmented.

Verify and Summarize

The only group that possesses segmented bodies, a complete digestive tract, and includes earthworms is the Annelids.

Final Answer

Annelids.