What are the pros and cons of an organism only having one cell

Explanation:Easier to adapt to changes in the environment (hot and cold) because they are so small. Cannot grow very large. Reproduce quickly because they are simple organisms. Do not live as long as multicellular organisms because there is only one cell to complete all life functions (

Reproduce quickly because they are simple organisms.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

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