Question

This is any functional structure within the confines of a cell; literally a. "small organ;" it usually has a membrane-based structure

Answer 1

Those are known as Organelles.

Answer 2

Answer: The correct answer is -

Cell organelle.

Cell organelles can be described as the specialized membrane bound compartments that are present within the cytoplasm of eukaryotic cells (such as plant and animal cell).

They serve specific function for the cell (such as mitochondria, which is the power house of the cell).

Example of cell organelles - Mitochondria, endoplasmic reticulum, golgi complex.