Question

explain phylum ptenaphora?

Answer 1

Ctenophora comprise a phylum of invertebrate animals that live in marine waters worldwide. They are notable for the groups of cilia they use for swimming, and they are the largest animals to swim with the help of cilia. Depending on the species, adult ctenophores range from a few millimeters to 1.5 m in size
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Phylum: Ctenophora; Eschscholtz, 1829
Scientific name: Ctenophora

Class 1. Tentaculata:

Order 1. Cydippida:

Examples:

Mertensia, Pleurobrachia.

Order 2. Lobata:

Examples:

Mnemiopsis, Bolinopsis.

Order 3. Cestida:

Examples:

Cestum, Velamen.

Order 4.

Examples:

Ctenoplana, Coeloplana.

Class 2. Nuda:

Order 1. Beroida:

Example:

Beroe.

Answer 2

Answer:

: any of a phylum (Ctenophora) of marine animals superficially resembling jellyfishes but having biradial symmetry and swimming by means of eight bands of transverse ciliated plates. — called also comb jelly.

Phylum Ctenophora Characteristics

• They are free-swimming, marine, solitary, pelagic animals. ...

• The body is transparent, gelatinous, pear-shaped, cylindrical, or flat or ribbon-shaped.

• They have a biradially symmetrical body along an oral-aboral axis.

• They have an external surface with comb-like 8 ciliary plates for locomotion.

Explanation:

@GENIUS