Onion and Cheek Cells
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Onion and Cheek Cells
Field notes
Cells are the tiny building blocks of living things. Onion cells come from a plant; cheek cells come from an animal. Both have a boundary that controls what enters and leaves, cytoplasm and a nucleus. The nucleus contains genetic material and helps control the cell’s activities. Cytoplasm is where many cell reactions happen. Plant cells also have a stiff cell wall outside the membrane, which supports the cell. Many plant cells have chloroplasts to absorb light for photosynthesis, but onion cells from the fleshy bulb usually have no chloroplasts because they grow underground. Plant cells often have a large vacuole containing cell sap.
Use the evidence
Answer each question using the field notes and the descriptions in the questions. Remember: the descriptions give cell shapes and boundaries, but not every cell structure is visible.
- Rectangular cells arranged in rows
- Irregular cells scattered separately
- Round cells with no boundaries
- Cells containing visible green chloroplasts
- Nucleus
- Cytoplasm
- Cell wall
- Supports the plant cell
- Contains genetic material and helps control activities
- Where many cell reactions happen
3 printable pages
Page 1
Page 2
Page 3
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