Phylum-Porifera
1. Name Porifera is given by
a) Aristotle b) Robert Grant c) Lamarck d) None
2. Choanocyte cells are characteristics of
a) Jelly fishes b) Sponges c) Platyhelminthes d) All the above
3. Canal system is found in
a) Coelenterata b) Enchinodermata c) Porifera d) All the above
4. In Leucosolenia, asexual reproduction takes place by
a) Binary fission b) Sporulation c) External budding (gemmation) d) Cyst formation
5. The gameters in sponges develop from
a) Amoebocytes b) Archeocytes c) Choanocytes d) Myocytes
6. Phylogenetically, the sponges have evolved from:
a) Protozoans b) Flagallates c) Choanoflagellates d) Ciliates
7. In sponges, the food is stored in :
a) Trophocytes b) Thesocytes c) Desmocytes d) Archeocytes
8. Which of the cells are found in sponges only
a) Amoebocytes b) Chromocytes c) Choanocytes d) Archeocytes
9. Which one of the sponge corresponds to the mouth of other animals
a) Osculum b) Incurrent canal c) Ostia d) Excurent canal
10. A chamber common to all types of canal system of sponges is called:
a) Paragastric cavity b) Radial chamber c) Excurrent canal d) Incurrent canal
11. If a carmine particle is put on the osculum of a living sponge, it will
a) Be ingested b) Be thrown away c) Rotate d) Adhere
12. Canal System in Leucosolenia is a)Asconoid b) Syconoid c) Leuconoid d) Rhagon
13. The digestion of Leucosolenia is
a) Intercellular b)flntracellular c) Extracellular d) Holozoic
14. The Skeleton of sponges is mostly formed by
a) Myocytes b) Chromocytes c) Porocytes d) Scleroblasts
15. The outer epithelium of the sponges is composed
a) Choanocytes b) Amoebocytes c) Pinacocytes d) Chromocytes
16. Pinacocytes are found in the body of a) Snail b) Rabbit c) Sponge d) Hydra
17. Middle layer of body wall of porifera is:
a) Mesoderm b) Mesenchyme c) Mesogloea d) Mesentery
18. The spongocoel in Leucosolenia is lined by
a) Amoebocytes b) Choancoytes c) Scleroblasts d) Pinacocytes
19. The larva of Leucosolenia is
a) Parenchymula b) Planula c) Amphiblastula d) Archeoblastula
20. The larva of Sycon is a) Parenchymula b) Planula c) Amphiblastula d) Redia
21. Exogenous budding a type of asexual reproduction in sponges is known as
a) Gemmulation b) Gemmation c) Regeneration d) Amphimixis
22. Endogenous budding is
a) Gemmule formation b) Gamets formation c) Gemmation d) Endomixis
23. Spongilla is a) Marine sponge b) Fresh water sponge c) No sponge d) Parasitic sponge
24. Spongacoel is also known as
a) Paragastric cavity b) Gastro-vascular cavity c) Water vascular cavity d) Coelenteron
25. The body wall of sponges has many a) Pores b) Gemmules c) Oscula d) Trophocytes
26. Venus flower Basket is
a) Euplectella b) Chalina c) Hyalonema d) Hippospongia
27. Excretory waste of Leucosolenia and sycon is a) Ammonia b) Urea c) Guianine d) Uric Acid
28. Maximum power of regeneration is found in
a) Sponge b) Hydra c) Starfish d) None
29. Spicules in sponges are made up of a) CaCO3 b) silica C) Both d) None
30. Tissue grade is absent in one of the following
a) Sponges b) Protozoans C) Both d) None
ANSWER

1B 2 B 3C 4C 5 B 6 C 7 B 8 C9 C 10 A 11 B 12 A 13 B 14 D 15 C 16 C 17 B 18 B 19 A 20 C 21 B 22 A 23 B 24 A 25 A 26 A 27 A 28 A 29 C 30 C