Which of these features is NOT characteristic of the class Hexactinellida?
Six-rayed siliceous spicules
Syncytial body structure with trabecular reticulum
Predominantly found in shallow, warm waters
Often exhibit radial symmetry
Related Questions
Which of the following animals can successfully reproduce without utilizing the process of mitosis?
Amoeba
Hydra
Tapeworm
Sycon
Feeding type of animals belonging to phylum-Porifera is
Raptorial feeders
Suctorial feeders
Filter feeders
None of these
Cells that are peculiar to the phylum-Porifera
Chimeras
Chondrocytes
Dendrocytes
Choanocytes
Which phylum is characterized by a meshwork of cells, internal cavities lined with flagellated cells for food filtering, and indirect development?
Porifera
Cnidaria
Platyhelminthes
Annelida
The central cavity in the body of a sponge is called:
Osculum
Spongocoel
Ostia
Gastrovascular cavity
From the following statements select the wrong one.
Millipeds have two pairs of appendages in each segment of the body
Prawn has two pairs of antennae
Animals belonging to phylum-Porifera are exclusively marine
Nematocysts are characteristic of the phylum-Cnidaria
Engulfing of food either in solid or liquid is called
Sporozoic nutrition
Holozoic nutrition
Parasitic nutrition
Saprophytic nutrition
The internal buds of freshwater sponges are otherwise called.
Choanocyte
Gemmule
Osculum
Blastula
What is the primary function of choanocytes in sponges?
Creating water currents and trapping food
Structural support
Reproduction
Excretion
The canal system is characteristic feature of
Helminthes
Coelenterates
Sponges
Echinoderms
