NEET BIOLOGY

Detailed explanation-1: -Having bilaterally symmetrical bodies (the same on both sides along an axis) permit them to propel forward in a straight line.

Detailed explanation-2: -Animals with bilateral symmetry have a “head” and “tail” (anterior vs. posterior), front and back (dorsal vs. ventral), and right and left sides. All true animals, except those with radial symmetry, are bilaterally symmetrical.

Detailed explanation-3: -Bilateral symmetry is more adaptive than radial symmetry for a motile animal because the animal can move faster because it can move in one direction.

Detailed explanation-4: -Bilaterally symmetrical animals tend to be active and move forward, tend to exhibit cephalization and have right and left sides when cut longitudinally.

Detailed explanation-5: -Bilaterally symmetrical animals have a dorsal side (top), a ventral side (bottom) and distinct left and right sides. They also have an anterior side (head), and a posterior side (tail), and exhibit cephalization.