Placozoans are simple, multicellular organisms with no true tissues or organs. They have a basic body plan consisting of a flattened, disc-like shape with cilia on the underside for movement and feeding. They reproduce both sexually and asexually. Genetic analysis shows that they are more closely related to animals such as sponges and ctenophores than to cnidarians.

Solved

Placozoans

Question 73

Multiple Choice

Placozoans:

A) are remarkable for their tissue complexity and organ development.
B) can reproduce sexually or asexually.
C) bear little to no resemblance to animals such as cnidarians on the basis of genetic analysis.

Correct Answer: