Question

Animal with generally marine and mostly Asymmetrical belong to phylum…………..
(a) Porifera
(b) Cnidaria
(c) Platyhelminthes
(d) Ctenophora

Answer 1

We know that the phylum Porifera generally has an asymmetrical body and is marine.

They are multi-cellular, pore-bearing animals and have no organs whatsoever. Phylum Porifera is also known for having the holozoic type of nutrition and also goes by the name "sponges".

Hence, Option (A) Porifera is the right answer to this question.

Answer 2

Animals with generally marine and mostly asymmetrical belong to the Phylum Porifera.

So, the right choice to the asked question is Option (A)

Explanation:

• The organims of the Phylum Porifera are mostly marine. Exception: Spongilla is that one animal of Porifera phylum which is a freshwater organism.

•They have organisation of only cellular kind.

•They do not have any fixed symmetry and hence are asymmetrical.

•Their body shape is mostly cylindrical. No any organs are present in their body.

•Their body possess numerous or many pores which are called Ostia.

•Asexual kind of reproduction takes place in the organisms of Porifera phylum through budding and also through fragmentation process.

•Examples are: Sycon, Spongilla, Euplectella, Cliona, etc.

•Holozoic type of nutrition is seen in them.

•They also has the capability to regenerate the lost parts through the process of regeneration.

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