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Fill in the blanks `:` (i) In the group Protosomia, `"….............."` is deerived fromt eh blastopore of the embryo and `"…..........."` is formed at the opposite end. (ii) In the group Deuterostomia, `"…............"` develops from the blastopore of the embryo and the `"..................."` arises at the opposite end. (iii) Similarity in the arrangement of parts on the opposite sides of the body is termedas `"................"`. (iv) Animals like Hydra and Jellyfish depict `"..................."` symmetry whereas allvertebrates show `"................."` symmetry. (v) The structures projecting from the body of an animal for use in locomotion, feeding and some other purposes are called `"..............."` (vi) There is no digestive tract in Mesozoa and `"................"` . On the other hand , most `"................"` have a digestive tract. (vii) In `".............."` and `"..................."` digestive tract has only single opening (mouth ) and is sait to be incomplete. (viii) Sponges develop from two germ layers and hence are termed `"............."` animals. They have `"............"` of organization. (ix) The digestive tract in coelenterates is `"..................."` and gastrovascular cavity acts as a `"............."` against which the contractile cells can work. (x) Jellyfishes and sea anemones belong to phylum `"............."` (xi) PhylumPlatyhelminthesis divided into three classes `,` Turbellaria, `"............."` and `"............."` . (xii) Trichinella (Trichina worm) is a cosmopolitan `"............."` paraste whereas Fasciola (liver fluke) lives in the bile ducts of the liver of `"............"` and `".............."` . (xiii) Arthropods are commonly known as animals `".........."`(xiv) Centripede belongs to class `"................"` while millipede belongs to class `".............."` |
Answer» (i) Mouth, anus (ii) Anus, mouth (iii) Symmetry (iv) Radial ,bilateral (v) Appendages (vi) Parazoa, Eumetazoa (vii) Coelenterata, Platyhelminthes (viii) diploblastic ,cellular level (ix) Incomplete , hydroskeleton (x) Coeenterata (xi) Trematoda, Cestoda (xii) Human, sheep, goats (xiii) with jointed feet (legs) (xiv) Chilopoda, Diplpoda. | |