Which level of organization is formed from two or more different tissues that group together and perform a function? 1. Molecule 2. Organ 3. Organ system 4. Tissue
The Correct Answer and Explanation is:
Correct Answer: 2. Organ
Explanation:
In biological systems, the body is organized into a hierarchy of levels, each building upon the previous one. The correct answer to the question is organ, which is formed when two or more different types of tissues come together to perform a specific function.
For example, the human heart is an organ composed of:
- Muscle tissue (cardiac muscle) that contracts to pump blood.
- Connective tissue that provides structure and support.
- Nervous tissue that controls the heartbeat.
- Epithelial tissue that lines the inner and outer surfaces of the heart.
These various tissues work together so the heart can function effectively as a pump. This integration of multiple tissue types to perform a particular role defines an organ.
Here is a quick overview of the biological levels of organization leading up to the organ level:
- Molecule – A chemical structure consisting of at least two atoms bonded together. Molecules are the building blocks of cells.
- Cell – The smallest unit of life, where basic functions occur.
- Tissue – A group of similar cells working together to perform a specific function (e.g., muscle tissue, nerve tissue).
- Organ – A structure composed of two or more types of tissues that work together to carry out a specific function.
- Organ system – A group of organs that work together to perform complex body functions (e.g., the digestive system includes the stomach, intestines, and other organs).
Understanding this hierarchy is important in biology because it shows how complex structures and systems arise from simpler components. Each level supports the next, and organs play a key role by integrating tissues into units that can perform specialized biological tasks.
