Which of the following is the most complex level of cell organization

what following?

Complex multicellular organisms

To determine the most complex level of cell organization, we need to understand the different levels of organization within the cell.

1. Organelles: These are the small structures within the cell that perform specific functions. Examples include the nucleus, mitochondria, endoplasmic reticulum, and Golgi apparatus.

2. Cells: Cells are the basic building blocks of living organisms. Each cell has a specific function and structure, which allows it to carry out specialized tasks. Examples include muscle cells, nerve cells, and skin cells.

3. Tissues: Tissues are groups of similar cells that work together to perform a specific function. There are four main types of tissues: epithelial, connective, muscle, and nervous tissue. Examples include the lining of the digestive tract, blood, muscle tissue, and neurons.

4. Organs: Organs are groups of tissues that work together to perform a specific function. Examples include the heart, liver, lungs, and brain.

5. Organ systems: Organ systems are groups of organs that work together to perform a specific function. Examples include the circulatory system, respiratory system, digestive system, and nervous system.

6. Organism: Organisms are individual living beings that are made up of multiple organ systems working together.

Among these levels of organization, the most complex level is the organ system. Organ systems consist of multiple organs that work together to perform specific functions necessary for the survival of the organism. Therefore, the organ system is the most complex level of cell organization.