The cell is a system, with many parts working together to produce proteins. Proteins have many functions that include building, repairing, breaking down, carrying supplies and many more. Give examples of the needs of a cell in order for it to function as a system, and explain the importance of each one. Use the words INPUT, PROCESS, and OUTPUT in your answer.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

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answer; i believe the correct answer to the above question is ( friction)