Question

multiple choice question
what animal group lacks true tissues and includes species that are asymmetrical?
o cnidarians
o sponges
o mollusks
o flatworms

Explanation:

• Cnidarians have true tissues and are radially symmetrical.
• Sponges (phylum Porifera) lack true tissues and many are asymmetrical.
• Mollusks have true tissues and are bilaterally symmetrical (in most cases).
• Flatworms have true tissues and are bilaterally symmetrical.

Answer:

sponges