Question

think about cell theory and the cell models you have seen. then, select the true statements about these human cells. the cells cannot be represented by models because their structures are too complex. 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. submit

Explanation:

• Cell theory states that all cells come from pre - existing cells. So, the statement "The cells were formed when other human cells divided" is true.
• All cells (prokaryotic and eukaryotic) have a cell membrane and cytoplasm. Cheek cells (eukaryotic) and red blood cells (eukaryotic, although they lose some organelles during development) have a cell membrane and cytoplasm. So, "Each cell has a cell membrane and a cytoplasm that contains cell parts" is true.
• Cells are complex units where different organelles (in eukaryotes) or cell components (in prokaryotes) work together. For example, in cheek cells, mitochondria produce energy, ribosomes make proteins etc. Red blood cells have hemoglobin (a protein) in their cytoplasm that helps in oxygen transport. So, "Each cell contains parts that work together to carry out processes necessary for life" is true.
• Cell models can represent cells. Scientists use models (physical, conceptual) to study cells. So, "The cells cannot be represented by models because their structures are too complex" is false.

Answer:

• 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.