This implies a nest of modular structures. Each entity is an organized array of constituent modular parts, and is at the same time the constituent of a larger module. Moreover, the modules interact with the levels above them and the levels below them. Thus a cell is part of a tissue and its organelles are parts of the cell. Just as the organelles function to make a coherent cell, so the cells must function to make a coherent tissue.
Development depends on modularity.
Since you're good with your hands and the price is reasonable, you order it. A week later a truck delivers to your door a basket of iron ore, a large sack of limestone, a box of bauxite, a large bag full of charcoal, and a container full of sap from a rubber tree. Without the production of these intermediates, there is no way that an organism can come into being. Proteins must be made from pre-assembled amino acids, and so forth. Tempus and Hora are both expert watchmakers who make complicated watches from numerous parts.