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(D) Metamerism is a phenomenon where the body is externally and internally divided into segments with a serial repetition of at least some organs. Org

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Organisms with metamerism exhibit radial symmetry.

Vedclass · Answer

(D) Metamerism is a phenomenon where the body is externally and internally divided into segments with a serial repetition of at least some organs. Organisms exhibiting metamerism (e.g.,Annelida,Arthropoda,Chordata) are triploblastic,coelomate,and exhibit bilateral symmetry. While Annelids possess a closed circulatory system,Arthropods possess an open circulatory system. Therefore,the statement that organisms with metamerism possess a closed circulatory system is not universally true. However,the most fundamentally incorrect statement among the options is that they exhibit radial symmetry,as all metameric animals exhibit bilateral symmetry.

Animal	Morphological Feature
$(i)$ Crocodile	$4$-chambered heart
$(ii)$ Sea cucumber	Echinodermata (Water vascular system)
$(iii)$ Obelia	Metagenesis
$(iv)$ Lemur	Thecodont

Select the incorrect option regarding organisms exhibiting metamerism:

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Which of the following pairs are correct?

Animal Morphological Feature

$(i)$ Crocodile $4$-chambered heart

$(ii)$ Sea cucumber Echinodermata (Water vascular system)

$(iii)$ Obelia Metagenesis

$(iv)$ Lemur Thecodont

The term "phylum" in animal classification was coined by

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