Question

which of the following phylum is known as sea walnuts? a) porifera b) ctenophora c) platyhelminthes d) puces. please answer me please ​

Answer 1

Answer:

option B

ctenophora

Explanation:

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Answer 2

$\Huge{\mathbb{CTENOPHORES\ \colon }}$

• Ctenophores are commonly called as Sea Walnuts,as their general body surface resembles Walnuts. As their habitat is aquatic , thus the name "Sea Walnuts"

• They're also called as "Comb Jellies". Rows of cilia run throughout the body of Ctenophores , which facilitate locomotion in these organisms. The number of rows can vary between 8 to 50.

• Ctenophores are bilaterally symmetrical i.e.,only one axis passing through the centre of the organism can divide the organism into two equal halves

• Ctenophores have an incomplete gut,the aboral end and oral end lie on the anterior and posterior ends respectively

• Ctenophores have adhesive structures called "Colloblasts" that are found on the rows of cilia

• Ctenophores develop indirectly i.e.,they exist as larvae before fully developing into an adult.

Example,

Ctenophora,Nuda etc