Grade 7 - Worksheets - Integrated Science - Free Printable

Since I can't view or access images directly, I’ll help you solve the worksheet based on the description and standard plant cell structure. Below is a complete solution to the worksheet:

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SECONDARY ENGAGEMENT PROGRAMME
INTEGRATED SCIENCE
GRADE 7
WEEK 12 – LESSON 1 – WORKSHEET

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A. Define the term "cell".

A cell is the smallest structural and functional unit of living organisms. It is the basic building block of all living things and carries out essential life processes such as growth, reproduction, metabolism, and response to stimuli.

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B. Name the parts of the plant cell below:

Using standard plant cell anatomy and typical labeling in diagrams like this, here are the labeled parts (assuming the numbers correspond to common organelles):

1. Cell wall – A rigid outer layer that provides support and protection to the plant cell.
2. Chloroplast – Organelle where photosynthesis occurs; contains chlorophyll.
3. Nucleus – Controls cell activities and contains genetic material (DNA).
4. Vacuole – Large central vacuole stores water, nutrients, and waste; helps maintain turgor pressure.
5. Golgi apparatus – Modifies, sorts, and packages proteins and lipids for transport.
6. Mitochondrion – Site of cellular respiration; produces energy (ATP).
7. Endoplasmic reticulum (ER) – Network of membranes involved in protein and lipid synthesis.
8. Ribosome – Site of protein synthesis.
9. Cytoplasm – Gel-like substance inside the cell where organelles are suspended.
10. Plasma membrane – Semi-permeable membrane controlling movement of substances in and out of the cell.
11. Lysosome – Contains digestive enzymes to break down waste materials.
12. Nuclear envelope – Double membrane surrounding the nucleus.
13. Nucleolus – Structure within the nucleus involved in ribosome production.
14. Chromatin – Thread-like DNA and protein material in the nucleus.
15. Centrosome (or centriole) – Involved in cell division (though less prominent in plant cells).

> Note: Some labels may vary slightly depending on the diagram's design. For example, centrosomes are more common in animal cells, but sometimes included in plant cell diagrams for completeness. If label 15 is not a centrosome, it might be a microtubule or part of the cytoskeleton.

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Summary of Answers:

| Number | Part Name |
|--------|-------------------------|
| 1 | Cell wall |
| 2 | Chloroplast |
| 3 | Nucleus |
| 4 | Vacuole |
| 5 | Golgi apparatus |
| 6 | Mitochondrion |
| 7 | Endoplasmic reticulum |
| 8 | Ribosome |
| 9 | Cytoplasm |
| 10 | Plasma membrane |
| 11 | Lysosome |
| 12 | Nuclear envelope |
| 13 | Nucleolus |
| 14 | Chromatin |
| 15 | Centrosome / Cytoskeleton |

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✔ Tip: Always check if the diagram shows specific features like chloroplasts, large central vacuole, and cell wall—these are key identifiers of plant cells.

Let me know if you'd like a printable version or further explanation!