Question

think about cell theory and the cell models you have seen. then, select the true statements about these human cells. each cell contains parts that work together to carry out processes necessary for life. each cell has a cell membrane and a cytoplasm that contains cell parts. the cells cannot be represented by models because their structures are too complex. the cells were formed when other human cells divided.

Explanation:

• First statement: Cell theory states that cells are the basic unit of life. Each cell has organelles (parts) that work together (e.g., mitochondria for energy, ribosomes for protein synthesis) to carry out life - sustaining processes.
• Second statement: All cells (prokaryotic and eukaryotic) have a cell membrane (to control what enters and exits the cell) and cytoplasm (a gel - like substance that contains cell parts/organelles). Cheek cells (eukaryotic) and red blood cells (although red blood cells lose their nucleus as they mature, they still have a cell membrane and cytoplasm with other components like hemoglobin).
• Third statement: Cell models (such as physical models, diagrams, or digital models) can represent cells. While cells are complex, models simplify their structure to highlight key features. For example, a simple diagram of an animal cell can show the cell membrane, nucleus, and cytoplasm, which are relevant for understanding basic cell structure.
• Fourth statement: Cell theory also states that all cells come from pre - existing cells. Human cells (like cheek cells and red blood cells) are formed by the division of other human cells. Red blood cells are formed from hematopoietic stem cells through a process of cell division and differentiation, and cheek cells are formed by the division of epithelial stem cells.

Answer:

• Each cell contains parts that work together to carry out processes necessary for life.
• Each cell has a cell membrane and a cytoplasm that contains cell parts.
• The cells were formed when other human cells divided.