Question

which animal lacks symmetry, has no embryonic tissues, and has intracellular digestion? a cnidarian a flatworm a sponge an annelid a planaria

Explanation:

• Cnidarians (e.g., jellyfish) have radial symmetry and embryonic tissues (diploblastic).
• Flatworms (e.g., planaria) have bilateral symmetry and embryonic tissues (triploblastic).
• Sponges (phylum Porifera) lack symmetry (asymmetrical), have no true embryonic tissues (parazoa), and use intracellular digestion.
• Annelids (e.g., earthworms) have bilateral symmetry and embryonic tissues (triploblastic).

Answer:

C. a sponge