how does arthopoda can be differentiated from that of echinodermata?

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Solution

Arthropoda
Echinodermata
Possess jointed legs/appendages for locomotion
Having a peculiar water driven tube system that they use for moving around.
Reduced body cavity (filled with blood)
Have a coelomic body cavity
They have chitinous exoskeleton
Body surface is covered all over by hard calcium carbonate structures (calcareous spines) that they use as a skeleton.
Body is bilaterally symmetrical
Symmetry is radial in adults but bilateral in larvae.
Have segmented body which is divided into head, thorax and abdomen
There is no head or tail, no left or right side
Found everywhere on earth ( in land, in soil and in water)
Exclusively free living marine animals.

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Question 7
In which group of animals, coelom is filled with blood?

(a) Arthropoda
(b) Annelida
(c) Nematoda
(d) Echinodermata

Question 27
Real organs are absent in

(a) Mollusca
(b) Coelenterata
(c) Arthropoda
(d) Echinodermata

Question 28
Hard calcium carbonate structures are used as skeleton by

(a) Echinodermata
(b) Protochordata
(c) Arthropoda
(d) Nematoda

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Arthropoda	Echinodermata
Possess jointed legs/appendages for locomotion	Having a peculiar water driven tube system that they use for moving around.
Reduced body cavity (filled with blood)	Have a coelomic body cavity
They have chitinous exoskeleton	Body surface is covered all over by hard calcium carbonate structures (calcareous spines) that they use as a skeleton.
Body is bilaterally symmetrical	Symmetry is radial in adults but bilateral in larvae.
Have segmented body which is divided into head, thorax and abdomen	There is no head or tail, no left or right side
Found everywhere on earth ( in land, in soil and in water)	Exclusively free living marine animals.