what is salient features of pofera
Answers
Answered by
2
they live mostly in sea water
they are not triploblastic
Answered by
0
Answer:
(1) All the sponges are Aquatic, Sedentary, Asymmetrical or Radially, First multicellular organisms and have cellular grade of organization.
(2) They are diploblastic. Ectoderm is formed by pinacocyte and endoderm is formed by choanocyte. Both layers are called pinacoderm and choandoderm.
(3) The body is perforated by numerous minute pores called ostia.
(4) The ostia open into a large cavity called spongocoel.
(5) The spongocoel opens to the outside by a large opening called osculum.
(6) The sponges possess an endoskeleton in the form of calcareous spicules.
(7) Excretion and respiration occur by diffusion.
(8) They have greater power of regeneration.
(9) Reproduction takes place by asexual or sexual methods.
(10) Development is indirect or direct. The common larval are parenchymula, amphiblastula, etc.
Similar questions