1:A sponge can be distinguished from other animals by the presence
(a) Hollow bod
(b) coelenteron
(c) choanocytes
(d) dermal papillae
Answer:(c) choanocytes
2:Animal of phylum porifera are characterised by
(a) Diploblastic organisation
(b) canal system
(c) coelom
(d) coelenteron
Answer:(b) canal system
3:Larva of sponge is known as
(a) planula larva
(b) trochophore larva
(c) glochidium larva
(d) amphiblastula larva
Answer:(d) amphiblastula larva
4:Gemmules are helpful in
(a) digestion
(b) sexual reproduction
(c) Secretion of spicules
(d) Survival in drought
Answer:(d) Survival in drought
5:Most of the sponges are
(a) solitary
(b) colonial
(c) fresh water forms
(d) cold water inhabitants
Answer:(b) colonial
6. Choanocytes in sponges are present
(a) on the external body surface
(b) line the gastric cavity
(c) in the mesodermal layer
(d) located between the outer and inner layers
Answer:(b) line the gastric cavity
7. Sycon belong to the class
(a) Calcarea
(b) porifera
(c) Desmospongia
(d) Hexactinellida
Answer:(a) Calcarea
8. Bath sponge belongs to the class
(a) porifera
(b) Desmospongia
(c) Hexactinellida
(d) Calcarea
Answer:(b) Desmospongia
9. Parazoa includes
(a) Cnidaria
(b) Acidaria
(c) Porifera
(d) None of these
Answer:(c) Porifera
10. Most common method of reproduction in sponges is
(a) binary fission
(b) budding
(c) multiple fission
(d) sexual reproduction
Answer:(b) budding
11. Skeleton of sponges is produced by
(a) Pinacocytes
(b) thescocytes
(c) choanocytes
(d) sclerocytes
Answer:(d) sclerocytes
12. The only fresh water species of sponges is
(a) Scypha
(b) Euspongia
(c) Spongilla
(d) Oscarella
Answer:(c) Spongilla
13. Venus’s flower basket is a
(a) Sea anemone resembling a flower basket
(b) sponge resembling a flower basket
(c) glass rope sponge
(d) ornamental mollusc
Answer:(b) sponge resembling a flower basket
14. Common bath sponge is
(a) Euplectella
(b) Spongilla
(c) Syon
(d) Euspongia
Answer:(d) Euspongia
15. Digestion in sponges is
(a) intracellular
(b) intercellular
(c) both a and b
(d) extracellular
Answer:(a) intracellular
16: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) innumerable mouths, one exit
17:_____________ is the name of the dried skeleton of ‘Venus flower basket’
(a) Euplectella
(b) Euspongia
(c) Leucosolenia
(d) Spongila
Answer:(a)Euplectella
18: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)Mostly marine animals but few are freshwater entities
19:Animals lacking excretory, respiratory and circulatory structures are
(a) Sponges
(b) Tapeworms
(c) Liver fluke
(d) Threadworms
Answer:(a)Sponges
20:These are ‘multicellular grade’ entity
(a) Vertebrates
(b) Sponges
(c) Prokaryotes
(d) Coelenterates
Answer:(b)Sponges
21: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)Multicellular without any tissue organization
22: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)Choanocytes
23:This is a flagellated larva of Leucosolenia
(a) Maggot
(b) Kedia
(c) Planula
(d) Parenchymula
Answer:(d)Parenchymula
24:Poriferan evolution from protozoans is evidenced by animals such as
(a) Paramecium
(b) Euglena
(c) Chlamydomonas
(d) Proterospongia
Answer:(d)Proterospongia
25: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)Paragastric cavity
26:Phylum Porifera’s diversity consists of major groups
(a) 2
(b) 3
(c) 4
(d) 5
Answer:(b)3
27: Which one of the following groups of Porifera is primarily shallow water and tropical.
(a) Calcarea
(b) Hexactinellida
(c) Demospongia
(d) none
Answer:(a)Calcarea
28:The group of Porifera considered as “glass sponges” is
(a) Calcarea
(b) Hexactinellida
(c) Demospongia
(d) none
Answer:(b)Hexactinellida
29:Skeletal elements of Phylum Porifera’s animals consist of
(a)Calcium carbonate
(b)Silicon dioxide
(c)Mucopolysaccharide
(d)a and b both
Answer:(d)a and b both
30:The main large exit found in Phylum Porifera’s members is called
(a) Phorocyte
(b) Ostia
(c) Osculum
(d) none
Answer:(c)Osculum
