According to animal classification into bilateria and radiata (ACCORDING TO SYMMETRY)the echinoderms and molluscs are bilaterally symmertrical.
radial symmetry, i am trying to find the reason now!
An equilateral triangle has both line symmetry and rotational symmetry. A non-equilateral isosceles triangle has line symmetry but not rotational symmetry. A scalene triangle has neither kind of symmetry.
it isn't because its a kind of nature.
A parallelogram has no lines of symmetry, but it has rotational symmetry.
The letters H and Z have both line symmetry and rotational symmetry
No, all vertebrates display bilateral symmetry.
All vertebrates including humans display bilateral symmetry.
All vertebrates including humans display bilateral symmetry.
All vertebrates including humans display bilateral symmetry.
All vertebrates including humans display bilateral symmetry.All vertebrates including humans display bilateral symmetry.
Of course,gastropods [eg:-snail] do not show any symmetry
Bilateral Symmetry
Lateral Symmetry.
Bilateral symmetry
bilateral symmetry
Radial Symmetry
Bilateral Symmetry