Answer: The correct answer for the fill in the blank is oragnelles.
All cells found in multicellular organisms have similar needs. For instance, for energy requirements, most of the cells derive energy from ATP that is produced through cellular respiration.
For fulfilling the similar needs, most organisms have developed similar organelles. Organelles are the specalized membrane bound structures that serve the specific needs of the cell.
For example- A typical cell possesses organelles like Mitochondria, endoplasmic reticulum, golgi complex, ribosomes etc.
Mitochondria is the power house of all cells as most of the energy is derived from it in the form of ATP ( adenosine triphosphate).
Thus, similar organelles meet the similar needs of the organisms.