Which organelle would be more developed in a cell of salivary glands?

Lysosomes

Explanation:

Salivary glands are secretory cells, meaning they release substances into the extracellular environment. In the case of the salivary glands, they secrete  water, electrolytes, mucus and enzymes, the components of saliva. Therefore, these cells have a very well-developed secretory system.

Lysosomes store secretory proteins and are important for keeping them sequestered from the rest of the cell, and eventually delivering them outside the cell.

multiply it by 5 in order for you to understand i cant give an exact answer.

this would be called the responsiveness