Plant Cell Diagram Worksheet with numbered labels for educational purposes.

Here’s the correct labeling for the numbered parts of the plant cell diagram, along with a clear explanation for each:

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1. Nucleus
→ The large, round organelle with a dark center (nucleolus). It controls cell activities and contains DNA.

2. Nucleolus
→ The dense, dark spot inside the nucleus. It’s where ribosomes are assembled.

3. Endoplasmic Reticulum (Rough ER)
→ The red, folded membrane structure attached to the nucleus. It helps in protein synthesis and transport. The “rough” appearance comes from ribosomes on its cytoplasmic side.

4. Ribosomes
→ Small dots floating in the cytoplasm or attached to the ER. They synthesize proteins.

5. Cytoplasm
→ The gel-like substance filling the cell between the cell membrane and organelles. It holds organelles in place and is where many metabolic reactions occur.

6. Vacuole
→ The large, gray sac occupying most of the cell’s volume. In plant cells, it stores water, nutrients, and waste, and helps maintain turgor pressure.

7. Cell Membrane
→ The thin layer just inside the cell wall. It regulates what enters and exits the cell.

8. Mitochondrion
→ The orange organelle with inner folds (cristae). It produces energy (ATP) through cellular respiration.

9. Chloroplast
→ The green, oval organelles with internal stacks (thylakoids). They perform photosynthesis using chlorophyll to convert sunlight into chemical energy.

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✔ Final Answer:

1. Nucleus
2. Nucleolus
3. Endoplasmic Reticulum (Rough ER)
4. Ribosomes
5. Cytoplasm
6. Vacuole
7. Cell Membrane
8. Mitochondrion
9. Chloroplast

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📌 *Note:* Some diagrams may label “Cell Wall” as #7 — but in this image, #7 clearly points to the membrane just inside the thick outer wall. The outermost green border is the Cell Wall, which is unlabeled here. If your teacher expects “Cell Wall” for #7, double-check — but based on arrow placement, #7 is the Cell Membrane.

Let me know if you’d like a printable version or flashcards for study! 🌿📚