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According to the content provided, animals from Aschelminthes up to Chordata generally show which level of organisation?

ACellular level
BTissue level
COrgan level
DOrgan-system level
Answer & Solution
Correct answer: D. Organ-system level
Aschelminthes to Chordata are placed at the organ-system level of organisation, where organs are coordinated into systems. This distinguishes them from simpler groups with only cells, tissues, or organs.
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