To accurately answer your question, I would need to see the specific diagrams you're referring to, as they could illustrate various cell activities such as cell division, cellular respiration, protein synthesis, or cell signaling. Each of these activities involves distinct processes and structures within the cell. If you can describe the diagrams or their key features, I can provide more targeted information.
Ingestion
the nucleus controls all the activity in the cell.
The nucleolus is often represented by a spherical or oval shape within the nucleus of a cell, depicted as a dense, dark-staining region. It is primarily associated with the production of ribosomal RNA (rRNA) and the assembly of ribosomes. In diagrams, it is commonly illustrated as a prominent, compact structure surrounded by the lighter staining nucleoplasm of the nucleus.
Desmosomes - anchoring junctions that hold adjacent cells together
Nucleus.
Ingestion
One can find detailed cell diagrams with all the features shown on Wikipedia which has images detailing the different organelles of the cell including visual graphics.
The Chloroplast
The specific structure within an animal cell that is not labeled in typical diagrams is the glycocalyx.
It stops the activity within the cell.
Chemical activity
The answer is nucleus :)
prokaryatics is one
The nucleus of a cell
A strategy for activity-based enzyme detection using a novel enamide-based chemical strategy is described. Enzymatic cleavage of an amide.
nucleus
The nucleus of the cell directs all the activity by controlling gene expression and regulating the cell's functions through the production of messenger RNA. Signals from the environment and within the cell also play a role in directing cellular activity.