Absence of head, unsegmented body and endoskeleton of dermal calcareous plate are the characters of
A. Mollusca
B. Arthropoda
C. Echinodermata
D. None of these
Group – A
Group – B
1) Dermal tissue
D) Mesodermis
2) Arenchyma
C) Helps plant to float
3) Mechanical support
A) Collenchyma
4) Trachieds
B) Xylem
5) Transpiration
E) Stomata
The supportive structures present inside the body form the endoskeleton and when the supportive structures are present on the outer surface of the body they form exoskeleton.
