Which among the following is a diploblastic organism?
Correct answer: A. Hydra
- A. Hydra
- B. Crabs
- C. Squid
- D. Earthworm
Explanation
Hydra is a diploblastic organism because it has two germ layers: ectoderm and endoderm. Ectoderm is the outer layer of cells, whereas, endoderm is the inner layer of cells. There is no middle layer, or mesoderm, in diploblastic organisms.
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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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