Question

Ctenoplana belongs to a group of animals which are best described as (1)Unicellular with tissue level of organisation (2)Multicellular with radially symmetrical body (3)Multicellular with organ level of organisation (4)Unicellular with bilaterally symmetrical bodies

Answer 1

(2) Multicellular with Radially symmetry body

Answer 2

Answer:

The answer is 2

Explanation:

Ctenplana belongs to the phylum Ctenophora, known to have biradial symmetry. Their structural details show that they are merely modified creeping ctenophores. Few characteristics of the species-

• Their body consists of a flattened oval, thick central portion and two rounded, thin lobes in the sagittal plane.
• A long tentacle runs between the lobes of the front notch, forming irregular side branches. The central tentacle emerges from the base, encased in a tentacular sheath. 
• Several plates are joined to the statocyst by ciliated furrows in eight short comb rows. 
• The everted pharynx, gastrovascular canal, and peripheral network of gastrovascular canals define the oral surface. 
• The anus can be found in the left lobe.