Name and discuss the levels of organization in a multicellular organism starting from the basic unit or structure of life.

The levels of organization in a multicellular organism are as follows:

1. Atoms and molecules: The basic building blocks of life, such as carbon, hydrogen, oxygen, and nitrogen, combine to form molecules like proteins, carbohydrates, lipids, and nucleic acids.

2. Cells: Cells are the smallest functional units of life. They vary in size, shape, and function, but all cells perform essential activities necessary for the organism's survival. Examples include muscle cells, nerve cells, and blood cells.

3. Tissues: A group of similar cells that work together to perform a particular function is called a tissue. There are four primary types of tissues in the human body: epithelial, connective, muscular, and nervous tissue.

4. Organs: Organs are composed of different types of tissues working together to carry out specific functions. Examples include the heart (composed of cardiac muscle tissue, connective tissue, and blood vessels) and the liver (composed of hepatocytes, blood vessels, and connective tissue).

5. Organ systems: Organ systems are groups of organs that work together to perform a particular function or set of functions. Examples include the cardiovascular system (heart, blood vessels, and blood), respiratory system (lungs, trachea, and bronchi), and nervous system (brain, spinal cord, and nerves).

6. Organism: The final level of organization is the whole multicellular organism itself, which is the combination of all the organ systems functioning together to maintain homeostasis and carry out daily activities.

To obtain this information, you can refer to biology textbooks, online educational resources, or search for articles on the levels of organization in multicellular organisms.