What level of organizational complexity is exhibited by higher groups of animals?

What level of organizational complexity is exhibited by higher groups of animals?
  1. Tissue level
  2. Organ level
  3. Organ system level
  4. Cellular level

Solution

Organ systems in different groups of animals exhibit a pattern of complexity at the organ system level, where organs have associated to form functional systems, each system concerned with a specific physiological function.

Asked in: NCERT

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