Question

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

Explanation:

• For "The cells were formed when other human cells divided": Cell theory states that all cells come from pre - existing cells. So, human cells (like the ones shown: intestine, nerve, cheek, red blood cells) are formed by the division of other human cells.
• For "Each cell has a cell membrane and a cytoplasm that contains cell parts": All cells (prokaryotic and eukaryotic) have a cell membrane that acts as a barrier. Cytoplasm is the fluid - like substance within the cell membrane that contains organelles (in eukaryotic cells) or other cell components (in prokaryotic cells). Human cells are eukaryotic, and even red blood cells (which lose their nucleus as they mature) still have a cell membrane and cytoplasm with some cell parts like hemoglobin.
• For "Each cell contains parts that work together to carry out processes necessary for life": In intestine cells, there are organelles like mitochondria (for energy production), ribosomes (for protein synthesis) etc. that work together for functions like digestion and absorption. Nerve cells have dendrites, axons and cell bodies with organelles that work together for signal transmission. Cheek cells have the usual eukaryotic organelles for functions like maintaining cell integrity and basic metabolic processes. Red blood cells have hemoglobin (a protein) in their cytoplasm which helps in oxygen transport.
• For "The cells cannot be represented by models because their structures are too complex": This is false. Cell models (such as physical models made of materials like clay or digital models) can represent the basic structures of cells. While cells are complex, models simplify them to highlight key features like the presence of a cell membrane, nucleus (in most cells, red blood cells are an exception as they lose their nucleus but still have a basic structure that can be modeled in a simplified way to show their role in oxygen transport).

Answer:

• "The cells were formed when other human cells divided" is a true statement based on cell theory.
• "Each cell has a cell membrane and a cytoplasm that contains cell parts" is true as per the basic structure of cells.
• "Each cell contains parts that work together to carry out processes necessary for life" is true because of the coordinated function of cell components.
• "The cells cannot be represented by models because their structures are too complex" is false as cell models can represent cell structures.