Question

what is a collection of similar cells and surrounding substances?
a extracellular matrix
b organ
c organ system
d tissue
e intracellular matrix

Explanation:

• Extracellular matrix: It is a network of macromolecules (such as proteins and carbohydrates) that surrounds cells, providing structural and biochemical support. It is not a collection of cells.
• Organ: An organ is made up of different types of tissues working together. For example, the heart has muscle tissue, connective tissue etc. So it is not just a collection of similar cells.
• Organ system: An organ system is a group of organs that work together to perform complex functions. For example, the digestive system has organs like the stomach, intestines etc.
• Tissue: By definition, a tissue is a collection of similar cells and the surrounding extracellular substances (which provide support etc.) that work together to perform a specific function. For example, muscle tissue has muscle cells and associated extracellular materials.
• Intracellular matrix: This term is not a standard biological term for a collection of cells. The intracellular environment refers to the inside of a cell.

Answer:

D. tissue