Respuesta :
Cells are the unit of structure as they form the structure of organisms. Organisms combine to form tissues, which further combine to form organs, organs combine to form organ systems, which further combine to form organisms. Thus, the cell is the basic unit of structure for all unicellular and multicellular organisms.
"A cell is defined as the smallest and the basic unit of life which is responsible for all processes of life."
Cells are the structural, functional, as well as biological units of all living things. A cell can replicate itself. Therefore, they are known as the building blocks of life.
Every cell contains a fluid called cytoplasm, which is covered by a membrane. Also, in the cytoplasm there are many biomolecules such as proteins, nucleic acids and lipids. Additionally, cellular structures called cell organelles are suspended in the cytoplasm.
Characteristics of Cells
The following are the types of important characteristics of cells:
- Cells provide structure and support to the organism's body.
- The interior of the cell is organized into different organelles surrounded by a separate membrane.
- The nucleus (the main organelle) holds the genetic information necessary for cell reproduction and growth.
- Each cell has a single nucleus and membrane-bound cells in the cytoplasm.
- Mitochondria, a double-membrane-bound cell is responsible for the energy transfer necessary for cell survival.
- Lysosomes digest unwanted material in the cell.
- Endoplasmic reticulum plays an important role in the internal structure of the cell by combining selected molecules and processing them, guiding and distributing them to the right places.
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