CLASSIFICATION
NINE COMMON ANIMAL PHYLA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Filter feeding animals
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Asymmetrical
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Contain pores
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Lack true tissue
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Simplest of all animals
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Detailed explanation-1: -The phylum has the following distinguishing characteristics: These are pore-bearing multicellular animals. The body has no organs. They exhibit holozoic nutrition.
Detailed explanation-2: -Sponges are considered to be one of the simplest animals, primarily because their bodies are not organized in organ systems or even tissues.
Detailed explanation-3: -The simplest animals include the sponges (Porifera) and the Cnidaria. Sponges are unsymmetrical or radially symmetrical, with many cell types but no distinct tissues; their bodies contain numerous pores and sharp protective spicules.
Detailed explanation-4: -General characteristics of Porifera: (i) These are the simplest multicellular, diploblastic animals. (ii) They are asymmetrical or radially symmetrical. (iii) Their cells are loosely held together in a gelatinous matrix, mesoglea and do not form tissues.