Division of labor is not seen in which of these multicellular animals?
Correct answer: D. A and B
- A. Hydra
- B. Euplectella
- C. Blood fluke
- D. A and B
Explanation
Hydra and Euplectella do not show division of labor because they have a very simple body organization. Hydra has only tissue-level organization, so most of its cells perform more than one function instead of being specialized. Euplectella (a sponge) shows only cellular-level organization and lacks true tissues and organs, therefore division of labor is absent. In contrast, the blood fluke shows division of labor as it has an organ-system level of organization with specialized organs performing specific functions.So D is the correct option.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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