Orgenelles
Within a particular "operating range".
Blood in the body carried respiratory gases (i.e. O2 and CO2) around the body to cells where it's needed for cellular respiration.
All the functions of a unicellular organsim must be carried out in its one cell where as in a multicellular organism (if it is large enough) cells are specialized.
The nucleus is the center of all cellular functions because it is pretty much the "brain" of the cell. It contains all the genetic information (DNA) that is required for functions to be carried out, like blueprints for a building.
the major role for organelles in a cell is to do the particular job which in turn is carried by the cell.For example chloroplast which is an organelle in plant absorbs sunlight for photosynthesis.
Most of the active functions of plasma membranes are carried out by proteins.
Cellular respiration
nucleus
Yes - cellular respiration is a process carried out in every living cell.
The different types of molecules that the cell assembles
Cells.
fixation of co2