CANAL SYSTEM IN SPONGES IN HINDI EXPLAINATION canalsysteminsponges bsc1styear porifera

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1.This about sponges is true • (a) one mouth, innumerable exits • (b) innumerable mouths, one exit • (c) large spacious stomach • (d) spicules are composed of chitin • Answer: (b) • • 2. _____________ is the name of the dried skeleton of ‘Venus flower basket’ • (a) Euplectella • (b) Euspongia • (c) Leucosolenia • (d) Spongila • Answer: (a) • • 3. Members of phylum Porifera are • (a) Mostly freshwater animals but few are marine entities • (b) Mostly marine animals but few are freshwater entities • (c) Exclusively freshwater animal • (d) Exclusively marine animals • Answer: (b) • • 4. Animals lacking excretory, respiratory and circulatory structures are • (a) Sponges • (b) Tapeworms • (c) Liver fluke • (d) Threadworms • Answer: (a) • • 5. These are ‘multicellular grade’ entity • (a) Vertebrates • (b) Sponges • (c) Prokaryotes • (d) Coelenterates • Answer: (b) • • 6. The group of animals to which Sycon belongs can be best described as • (a) Multicellular having tissue organization, but not a body cavity • (b) Unicellular or acellular • (c) Multicellular with a gastrovascular cavity • (d) Multicellular without any tissue organization • Answer: (d) • • 7. Collared, flagellated cells that cover large parts of the inner chambers of sponges, helping water circulation to continue are • (a) Porocytes • (b) Choanocytes • (c) Amoebocytes • (d) Pinacocytes • Answer: (b) • • 8. This is a flagellated larva of Leucosolenia • (a) Maggot • (b) Kedia • (c) Planula • (d) Parenchymula • Answer: (d) • • 9. Poriferan evolution from protozoans is evidenced by animals such as • (a) Paramecium • (b) Euglena • (c) Chlamydomonas • (d) Proterospongia • Answer: (d) • • 10. The chamber common to all the types of the canal system of sponges is • (a) Excurrent canal • (b) Radial chamber • (c) Incurrent canal • (d) Paragastric cavity • Answer: (d) • • • #zoologynotes #biology #zoology #b #cell #msc #shomubiology porifera #invertebrates #bsc1styear #sponges #canal system

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