BIOLOGICAL CLASSIFICATION
KINGDOM ANIMALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Concentrates.
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Platyhelminthes.
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Nematahelminthes.
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Arthropods.
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Detailed explanation-1: -There are many organs systems existing in advanced phyla such as the circulatory system, respiratory system, digestive one, muscular, etc. But Platyhelminthes do not have all these organ systems developed, so the organization is supposed to be organ level one.
Detailed explanation-2: -Phylum Platyhelminthes have cellular level of organisation.
Detailed explanation-3: -They have no circulatory system or body cavity (coelom), but they do have an excretory and digestive system. They take in oxygen through their skin. The highly branched gut cavity distributes nutrients to their cells.
Detailed explanation-4: -Organ system level of organisation is observed in Phylum Aschelminthes (Nematoda), and all the groups above it in the Animal Kingdom.
Detailed explanation-5: -Organs appear first in the Platyhelminthese (flatworms).