A) A group of animals in which the space between the ectoderm and endoderm is simply filled with mesenchymal mesodermal cells.
B) A group of animals with long, flat body without true segmentation, that lives in water or moist soil or are parasitic invertebrates.
C) A group of animals that have an elongated, cylindrical and unsegmented body.
D) A group of animals that have an elongated body that is composed of partitions called metameres or annulations.
Correct Answer: D
Solution :
The body of Annelids is metamerically segmented externally by transverse grooves and internally by septa.
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