An organism appears to be a segmented worm. Upon observation, it is determined that the organism has a closed circulation, a mouth, and an anus and does not have an exoskeleton. The organism most likely belongs to the phylum:
Correct answer: B. Annelida
- A. Mollusca
- B. Annelida
- C. Echinodermata
- D. Arthropoda
- E. Chordate
Explanation
Annelida: This phylum includes segmented animals like; earthworms, leech, etc Their body is soft and bilaterally symmetrical Their body is divided into the ring like grove(segments) called annuli. They have a complete digestive system from the mouth to anus Excretion is by nephridia. They have a closed circulatory system. Sexes may be separate or united (sexual reproduction ). The true body cavity is present. Eg; Pheretima, leech.
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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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