During unfavourable conditions, the sponges form
Cyst
Encyst
Spicle
Gemmule
Related Questions
What is left when bath-sponges dries up?
Spicules
Spongin fibres
Tentacles
Holdfast
Collar cells are characteristic of
Earthworm
Roundworms
Coelenterates
Sponges
The cells responsible for secreting spicules in sponges are called:
Choanocytes
Pinacocytes
Sclerocytes
Archaeocytes
Larva of Sycon is
Parenchymula
Amphiblastula
Redia
Trochophore
Which of the following is NOT a characteristic feature of Porifera?
Presence of choanocytes
Presence of a true coelom
Body supported by spicules or spongin fibres
Mostly marine, asymmetrical body
Which of the following does not belong to the class-Hexactinellida?
Hyalonema
Cliona
Euplectella
None of these
Sponges primarily reproduce asexually by:
Binary fission
Budding and gemmule formation
Fragmentation only
Spore formation
Which of the following is a freshwater sponge?
Sycon
Spongilla
Euplectella
Hyalonema
Food storage in Leucosolenia occurs by
Ostia
Osculum
Thesocytes
pongocoel
The central cavity in the body of a sponge is called:
Osculum
Spongocoel
Ostia
Gastrovascular cavity
