The nervous system .
a. consists of neurons that act as insulating cells
b. is based on the cell-to-cell communication of DNA
c. consists of motor neurons that detect stimuli
d. transmits information through skeletal muscle contraction
e. has three types of neurons: sensory neurons, interneurons, and motor neurons

The correct answer is option (E) that has three types of neurons: sensory neurons, interneurons, and motor neurons.

Explanation:

Nervous system consist of nerve cells which are responsible for carrying messages from one part of the body to another.

There are three types of neurons present in nervous system i. e. sensory neurons, interneurons, and motor neurons. Sensory neurons carry impulse from body parts to the brain, motor neurons carry instructions from brain to body parts and interneurons make a connection between sensory and motor neurons.

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the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.