BIOLOGICAL CLASSIFICATION
KINGDOM ANIMALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Porifera
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Cnidaria
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Platyhelminthes
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Chordata
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Detailed explanation-1: -Porifera is the most primitive animal group. The different phyla of the animal kingdom include-Phylum Arthropoda, Plylum, Annelida, Phylum Mollusca, Phylum Coelenterata, etc.
Detailed explanation-2: -The most primitive metazoan animals, the placozoans, show high sensitivity to increasing ocean temperatures and acidities-PMC.
Detailed explanation-3: -Porifera have no internal organs, nervous tissue, circulatory system, or digestive systems, making them the most primitive of the multi-cellular animals.
Detailed explanation-4: -Sponges are considered to be one of the simplest animals, primarily because their bodies are not organized in organ systems or even tissues. Rather, sponges are made up of a grouping of cells that work together to contribute to meeting the daily needs of the sponge.
Detailed explanation-5: -So, the correct answer is ‘Sponges’.