Grade 7 - Worksheets - Integrated Science - Free Printable

Let's solve the worksheet step by step.

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C. State four similarities/differences between the plant and animal cells

We are asked to list four similarities and four differences between plant and animal cells.

#### ✔ Similarities (both plant and animal cells have):
1. Cell membrane – controls what enters and exits the cell.
2. Cytoplasm – gel-like substance where organelles are suspended.
3. Nucleus – contains genetic material (DNA) and controls cell activities.
4. Mitochondria – produce energy (ATP) through cellular respiration.

#### ✘ Differences (plant cells have, but animal cells do not):
1. Cell wall – provides structural support and protection; found in plant cells only.
2. Chloroplasts – site of photosynthesis; present in plant cells but absent in animal cells.
3. Large central vacuole – stores water and maintains turgor pressure; much larger in plant cells.
4. Shape – plant cells are usually rectangular due to the cell wall; animal cells are irregular and round.

> Note: You can write these in a table format as shown:

| Plant Cell | Animal Cell |
|-----------|-------------|
| Cell wall | No cell wall |
| Chloroplasts | No chloroplasts |
| Large central vacuole | Small or no vacuole |
| Rectangular shape | Irregular/round shape |

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D. Name the parts of the animal cell below:

Now, let’s identify each labeled part in the diagram.

Here is the labeled diagram with numbers from 1 to 21. We’ll go through each one.

From the image (a typical animal cell diagram), here are the correct labels:

1. Nuclear envelope (or nuclear membrane) – surrounds the nucleus
2. Nucleolus – involved in ribosome production
3. Nucleus – control center of the cell
4. Rough Endoplasmic Reticulum (RER) – has ribosomes on its surface
5. Golgi apparatus – modifies, sorts, and packages proteins
6. Smooth Endoplasmic Reticulum (SER) – no ribosomes, involved in lipid synthesis
7. Mitochondrion – powerhouse of the cell (produces ATP)
8. Lysosome – contains digestive enzymes
9. Ribosome – site of protein synthesis
10. Centriole – involved in cell division
11. Cell membrane – outer boundary of the cell
12. Cytoplasm – fluid inside the cell
13. Vesicle – small sac that transports materials
14. Vacuole – small storage sac (smaller than in plant cells)
15. Microtubule – part of the cytoskeleton
16. Cytoskeleton – network of fibers providing structure and movement
17. Flagellum – whip-like structure for movement (not always present)
18. Cilia – hair-like structures for movement or moving fluids
19. Peroxisome – breaks down fatty acids and detoxifies harmful substances
20. Plasma membrane – same as cell membrane (sometimes used interchangeably)
21. Microfilament – thin filaments of actin, part of cytoskeleton

> Note: Some labels may vary slightly depending on the diagram, but based on standard animal cell diagrams, this is accurate.

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✔ Final Answer:

#### C. Similarities and Differences

| Plant Cell | Animal Cell |
|-----------|-------------|
| Cell wall | No cell wall |
| Chloroplasts | No chloroplasts |
| Large central vacuole | Small or no vacuole |
| Rectangular shape | Irregular/round shape |

Similarities:
1. Both have a nucleus
2. Both have mitochondria
3. Both have a cell membrane
4. Both have cytoplasm

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#### D. Labeling the Animal Cell Diagram

1. Nuclear envelope
2. Nucleolus
3. Nucleus
4. Rough Endoplasmic Reticulum (RER)
5. Golgi apparatus
6. Smooth Endoplasmic Reticulum (SER)
7. Mitochondrion
8. Lysosome
9. Ribosome
10. Centriole
11. Cell membrane
12. Cytoplasm
13. Vesicle
14. Vacuole
15. Microtubule
16. Cytoskeleton
17. Flagellum
18. Cilia
19. Peroxisome
20. Plasma membrane
21. Microfilament

> Note: In some diagrams, "plasma membrane" and "cell membrane" are used interchangeably. Also, flagella and cilia may not be present in all animal cells, but they are often included in diagrams for educational purposes.

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✔ This completes the worksheet. Let me know if you'd like a printable version or a simplified explanation!