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Q.
Which one of the following animal has pseudocoelome ?
Delhi UMET/DPMTDelhi UMET/DPMT 2008
Solution:
Ancylostoma belongs to phylum- Aschelminthes. The Aschelminthes is the first assemblage of animals, which possess a distinct body cavity. but with peritoneal lining and mesenteries (septa of connective tissue) as found in other advanced animals.
This type of body cavity is called a pseudocoel and the animals are called pseudocoelomate. Cockroachs body is composed of 3 types of body walls
[a] Cuticle
[b] Hypodermis
[c] Basement membrane It belongs to phylum-Arthropoda Aurelia belongs to phylum-Cnidaria.
Their body typically dimorphic.
Body wall diploblastic, ie, formed from two embryonic germinal layers ? ectoderm and endoderm and has gastrovascular cavity.
Fasciola belongs to phylum-Platyhelminthes. It lacks a coelom and cellular surface epidermis. Instead, there is a thick, tough and protective continuous layer of cytoplasm.