D. This is because convection is the process of heat passing through liquid or gas.
The level of organization that the endocrine system is known as the organ system. While the level of organization in which the digestive system is is known as the organ system.
<h3>What is the level of organization?</h3>
The level of organization may be defined as the collection of structures in nature that are usually defined by part-whole relationships, with things at higher levels being composed of things at the next lower level.
In living organisms, a cell is the basic fundamental structural and functional unit of life. Cell initiates the level of organization in the manner as follows:
- Cell < Tissue < Organ < Organ system < Organism.
With this aspect, the endocrine system and the digestive system consist of a series of organs, so both of the systems fall under the category of organ system at the level of organization.
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An organism is d. a group of organ systems working together.
An atom goes into a molecule which goes into a cell which goes into a tissue which goes into an organ which goes into an organ system which goes into an organism.
Organs working together with other organs create a system of organs or an organ system. Something like this helps keep a human body, for example, functioning since everything relies on each other.
Remember that if your respiratory (breathing) system and nervous (brain) system did not work together, you would not be alive, and therefore no longer a living organism.