Question

think about cell theory and the cell models you have seen. then, select the true statements about these human cells. 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. each cell contains parts that work together to carry out processes necessary for life.

Explanation:

• First statement: All cells (including cheek and red blood cells) have a cell membrane (to control what enters and exits) and cytoplasm (where cell - related activities occur).
• Second statement: This is false. Cells can be represented by models. For example, simple cell models can show the basic components like membrane, cytoplasm, and in some cases (like cheek cells which are eukaryotic), a nucleus (red blood cells lose their nucleus as they mature, but we can still model their structure as a cell with membrane and cytoplasm).
• Third statement: According to cell theory, all cells come from pre - existing cells. So these human cells were formed by the division of other human cells.
• Fourth statement: Each cell has components (even red blood cells, although they are simple, have hemoglobin for oxygen transport etc.) that work together. Cheek cells (eukaryotic) have more organelles like mitochondria (for energy) that work together for life processes.

Answer:

• "Each cell has a cell membrane and a cytoplasm that contains cell parts" is a true statement.
• "The cells cannot be represented by models because their structures are too complex" is a false statement.
• "The cells were formed when other human cells divided" is a true statement.
• "Each cell contains parts that work together to carry out processes necessary for life" is a true statement.