MCQ’S ON PORIFERA
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)
