Characteristics of porifera

Answer 1

1. Multicellular organism
2. Eukaryotic organism
3. Heterotroph
4. diploblastic animal
5. radial symmetry
6. Mouth and digestive cavity absent
7. asexual and sexual reproduction
8. Mostly live in marine water
9. Skeleton is made up of calcareous
10. non motile animals
11. have cellular level of organisation
12. their body have number of pores
13. digestion is intracellular
14. muscle and nerve cell are absent
15. contain special type of cell called collar cell or choanocytes
16. appendages are absent
17. ex:- sycon, spongilla

Answer 2

• Porifera is the phylum for Sponges.
• 
  
• Example of A Sponge:
• Kingdom: Animalia
• Phylum: Porifera
• Class: Calcarea
• Subclass: Calcinea
• Order: Clathrinida
• Family: Leucaltidae

Answer 3

Important classes of Porifera are
1 Class Calcarea with CaCO3 spicules .
2 Class Hexactinilida with triradiate silicous spicules .
3 : Class Demospongea , complex marine sponges .

Answer 4

There are 3 classes: Hexactinellida, Calcarea, Demospongiae. For more information on each go to this useful site: http://www.bumblebee.org/invertebrates/Porifera.htm

Answer 5

sponges

Answer 6

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