The answer that would best complete the given statement above would be the second option: MUSCLES. Contractile proteins are found in muscles. <span>The muscles themselves contain muscle fibers, each of which contains cylindrical strands of </span>contractile proteins <span>called myofibrils. Hope this answers your question.</span>
What is cell specialization?
Answer: cell specialization is an adaptation to do a particular job in a cell
The ecosystem is an ecological system consisting of all of its biotic and abiotic factors
