Answer:
C)radial symmetry.
Explanation:
The central nervous system (CNS) is a part of the nervous system, it comprises the spinal cord and the brain. The brain plays in an important role in controlling most functions in the body such as movement, memory, speech etc.
Animals that have bilateral symmetry have a central nervous system because of the presence of the brain. But animals with radial symmetry such Cnidarians which include corals and jelly fish, do not have a central nervous system. Instead of the presence of neurons, they possess nerve nets.
The central n-ervous system is lacking in animals that have:
C) Radial symmetry.
The central n-ervous system is lacking in animals that have a radial symmetry.
Radial symmetry could be a shape of symmetry in which in-distinguishable parts are organized in circular mold around the central p-ivot. In this way, cu-tting it through the central hub in any course gives identical parts.
Thus, the correct answer is C.
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