Which of the following animals have scattered cells with cell tissue grade organisation?
Correct answer: B. Hydra
- A. Sponge
- B. Hydra
- C. Liver fluke
- D. Ascaris
Explanation
Hydra shows a tissue level of organization. This means its body is made up of many cells that are grouped into two main layers (tissues), and these tissues have specialized functions.Sponges are simpler and show only a cellular level of organization. Their cells work independently, without forming true tissues.Liver fluke and Ascaris are more advanced and show an organ-system level of organization. Their cells form tissues, tissues form organs, and the organs work together in systems (like digestive or reproductive systems) to keep the body functioning.
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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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