In humans, what is the average lifespan of a red blood cell (erythrocyte) in circulation?

In the context of properties of the cell, what is the primary structural polysaccharide that makes up the cell wall of fungi?

In a typical eukaryotic cell, what are the two major parts of the cell?

In humans, what is the typical lifespan of a mature red blood cell (erythrocyte) in circulation under normal physiological conditions?

In the context of the properties of the cell, what is the primary structural polysaccharide found in most fungal cell walls?

In the context of cell structure and the properties of the cell, which cell component is best described as the jelly-like substance that fills the cell and surrounds the organelles?

In the context of cell structure, what is the gooey, gel-like material inside a cell (excluding the nucleus) that surrounds the organelles called?

In general, what is the approximate mass of a typical bacterial cell (e.g., Escherichia coli)?

Which structures are found in every living cell (both prokaryotic and eukaryotic)?