Which of the following levels of hierarchy include all of the others?
A) organs
B) atoms
C) tissues
D) molecules
To determine which level of hierarchy includes all of the others among organs, atoms, tissues, and molecules, we need to understand the concept of hierarchy and the relationship between these entities.
Hierarchy refers to a system in which entities are ranked or organized based on levels of complexity or inclusiveness. In this case, we are considering different levels within the field of biology.
Atoms are the smallest building blocks of matter and are the basic units of chemical elements. They are the foundation of molecules.
Molecules are formed when two or more atoms chemically combine together. They can be simple or complex and are the building blocks of various substances in living organisms.
Cells are the building blocks of life and the smallest units of living organisms. They are composed of various molecules and are the foundation of tissues.
Tissues are groups of similar cells that work together to perform a specific function. They are composed of cells that work collectively to carry out specialized tasks.
Organs are composed of different tissues that work together to perform specific functions and maintain the overall functionality of an organism.
Based on this information, we observe that atoms are the basic units that form molecules. Molecules, in turn, combine to form cells, which then organize to form tissues. Finally, tissues work together to create organs. Therefore, the correct answer is D) molecules, as they include the other options (atoms, tissues, and organs) within the hierarchy.