The life forms exhibiting the simplest cellular structure are a. prokaryotes b. organelles c. eukaryotes

Option A , Prokaryotes

Explanation:

The simplest form of life existing on earth is the prokaryotes. Prokaryotes have a single celled structure which does not contain an individual nucleus. Also it has no membrane bound organelles. There are several organelles which are not even present in prokaryotes as compared to a eukaryotic cell. They have a simple chromosome that is circular in shape

Prokaryotes include bacteria and archaes  

Hence, option A is correct

what's the

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

the must be sensory neurons.  

hope its .