Primary function of the cell membrane? * Protein synthesis
Protecting organelles
Filling space between cell organelles
DNA replication

Answer

primary function of cell membrane is protecting organelles because cell membrane acts as a physical barrier allowing a very few molecules across it while fencing the majority of chemicals inside cell in this way it maintains the internal composition of cell and protect the organelles from the attack of bacteria and viruses

Explanation:

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stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.