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 `".............."`

Explanation

(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.