Answers

2015-02-15T18:46:56+05:30
porifera :-
- sedentary 
- sessile
- appendages are absent
- cellular level of organisation
- exo- skeleton
- radial symmetry
- non-motile
- reproduction is asexual by budding . 
e.g.sycon , eupletilia

platyhelminthe :-
- 'platy' means flat and 'minthes' worm 
- organisms of this phylum are dorsiventral
- parasitic
- bilateral symmetry 
- triploblastic
- reproduction sexual and also asexual 
- organ level of organisation .
- skeleton is absent 
e.g.planaria , tapeworm , etc.

nematoda :-
- bilateral symmetry 
- false coelom 
- triploblastic 
- nervous system well developed 
- reproduction is sexual 
- they are free living means they are live in water as well as moist soil

annelida :-
- bilateral symmetry
- triploblastic 
- reproduction is sexual
- organ level of organisation
- segments are visible .
- they are free living
- they attached themselves to the body of animals and food by sucking 
e.g.leech ,nereis ,etc.

echinodermata :-
- found in bottom of the sea
- triploblastic
- coelomic cavity
- reproduction is sexual 
- radial symmetry 
e.g.starfish , feather fish , etc.


0
2015-02-15T18:54:38+05:30
porifera :-
- the term porifera given by scientist robert grant .
- they are aquatic
- they are non-motile
- reproductio may be asexual or bisexual
- exo skeleton
- body organisation is multicellular with cellular level .
 e.g.spongilla

cnidaria :-
- mostly are marine
-radial symmetry
- reproduction is asexual and sexual
- respiratory system are absent
- diploblastic
e.g.hydra

mollusca :-
- bilateral symmetry
- nervous system are well developed
- reproduction is sexual
- circulatory system is mainly closed
- exoskeleton
- respiration by gills and lungs
e.g.octopus

echinodermata :-
 - marine
- triploblastic
- alimentary canal is straight
- reproduction is sexual
- body shape is star like and globular .
e.g. sea urchin , starfish , etc.

0