Gills

Which of the following is/are not the characteristics of the Class Osteichthyes? (i) Body is streamlined and mouth is terminal. (ii) Gills are convered by operculum. (iii) Skin convered with cycloid and placoid scales. (iv) Many of them are viviparous.

Gill is monopectinate in

Gill fungi are

Gill slits of chordates are

Gill slits function in :

Gill clefts and notochord appear in the embryonic development of all vertebrates from fishes to mammals. This supports the theory of

Gill cells and notochord appear in the embryonic development of all vertebrates from fishes to mammals. This supports the theory of

Which of the following characters are seen in sharks ? (i) Body is streamlined and mouth is terminal . (ii) Gill slits are not covered by operculum . (iii) Skin is tough ,containig minute placoid scales . (iv) many of them are oviparous .

Match column I with column II and select the correct option from the given codes. {:("Column I",,"Column II"),("(Animals)",,"(Respirartory structures)"),("A. Pigeon " ,,"(i) Book gills"),("B. Scorpion",,"(ii) Pharyngeal wall"),("C. Planaria",,"(iii) Lungs"),("D. Earthworm",,"(iv) Gilles"),("E. Spiders",,"(v) Book lungs"),("F. King crab",,"(vi) Body surface"),("G. Prawn",,"(vii) Skin"),("H. Labeo",,):}

Fill up the blank spaces in the tabe below by selecting the correct option. {:("Phylum/Class","Excretory organ","Circulatory system","Respiratory organ"),("Arthropoda",A,B,"Lungs/Gills/Tracheal system"),(C,"Nephridia","Closed","Skin"),(D,"Methanephridia","Open",E):}