Question

define1 -bilateral symmetry and radial symmetry.

Answer 1

An animal with radial symmetry could be divided into equal portions from the center, in the same way that you could cut a pie into wedges. An animal with radial symmetry really has no right and left side or head and rear end. Radial symmetry is ideal for animals that do not move, so they can reach into their environment on all sides. Consider the starfish as an example of radial symmetry.
Animals with bilateral symmetry can be divided only into mirror halves through a single plane. Higher animals that move are normally bilateral, with matching left and right sides. Bilateral symmetry is associated with having a head or leading end of a body that encounters the environment first, so the sense organs like eyes and mouth are usually there. Bilateral symmetry often gives animals more streamlined shapes for moving through their environments. You, your dog and his fleas are bilateral.

Answer 2

hey mate here is the answer....

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Bilateral symmetry:

When the body can be divided into identical left and right halves in only one plane, it is called bilateral symmetry and the animals possessing this type of symmetry are called bilaterally symmetric.

Radial symmetry:

When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry and the organisms possessing it are called radially symmetric.

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