Question

question 21
correctly identify the following labels on the plant and animal cells.

column a

1. ____ a
2. ____ b
3. ____ c
4. ____ d
5. ____ e
6. ____ f
7. ____ g
8. ____ h
9. ____ i (present in both cells - labeled in one)

column b
a. chloroplasts
b. endoplasmic reticulum
c. mitochondriad. nucleuse. centriole
f. vacuole
g. cell membrane
h. cell wall
i. cytoplasm

Explanation:

Step1: Analyze Label A

Label A is the outer layer of the cell. In plant cells, the outermost layer (after cell wall) is cell membrane, but in animal cells, the outer layer is cell membrane. Wait, no—plant cell has cell wall (B) and then cell membrane (A? Wait, no, looking at the diagram: Plant cell (left) has a rigid outer layer (B) which is cell wall, and then the inner layer (A) is cell membrane? Wait, no, the labels: A is pointing to the membrane of both cells. Wait, animal cell has only cell membrane. Plant cell has cell wall (B) and cell membrane (A). So A is cell membrane (g).

Step2: Analyze Label B

Label B is the rigid outer layer of plant cell, so cell wall (h).

Step3: Analyze Label C

Label C is the fluid inside the cell, cytoplasm (i).

Step4: Analyze Label D

Label D is the large vacuole in plant cell and small vacuole in animal cell, so vacuole (f).

Step5: Analyze Label E

Label E is the nucleus (d), as it's the control center with nucleolus.

Step6: Analyze Label F

Label F is mitochondria (c), as it's the power house, present in both cells.

Step7: Analyze Label G

Label G is centriole (e), as centrioles are in animal cells (and some plant cells, but labeled here in animal cell). Wait, no—wait the diagram: G is pointing to a structure in animal cell, which is centriole (e).

Step8: Analyze Label H

Label H is chloroplasts (a), as chloroplasts are only in plant cells, for photosynthesis.

Step9: Analyze Label I

Label I is endoplasmic reticulum (b)? Wait, no—wait the options: I is present in both cells. Wait, the label I is pointing to a structure in animal cell, maybe endoplasmic reticulum? Wait, no, let's recheck:

1. A: Cell membrane (g) – both cells have cell membrane, plant cell has it inside cell wall.
2. B: Cell wall (h) – only plant cell.
3. C: Cytoplasm (i) – jelly-like substance in both cells.
4. D: Vacuole (f) – large in plant, small in animal.
5. E: Nucleus (d) – control center, present in both.
6. F: Mitochondria (c) – power house, present in both.
7. G: Centriole (e) – present in animal cells (and some lower plants), involved in cell division.
8. H: Chloroplasts (a) – only plant cells, for photosynthesis.
9. I: Endoplasmic reticulum (b)? Wait, no—wait the label I is pointing to a structure in the animal cell, maybe endoplasmic reticulum? Or wait, the options: b is endoplasmic reticulum, e is centriole, g is cell membrane, etc. Wait, maybe I made a mistake. Let's correct:

Wait, the labels:

- A: Cell membrane (g) – correct, as it's the plasma membrane of both cells.
- B: Cell wall (h) – plant cell's rigid outer layer.
- C: Cytoplasm (i) – the fluid matrix.
- D: Vacuole (f) – large in plant, small in animal.
- E: Nucleus (d) – contains genetic material.
- F: Mitochondria (c) – produces ATP.
- G: Centriole (e) – animal cell has centrioles (plant cells usually don't, except lower plants).
- H: Chloroplasts (a) – plant cell has chloroplasts for photosynthesis.
- I: Endoplasmic reticulum (b) – the network structure, present in both cells. Wait, but the label I is in animal cell. Alternatively, maybe I is endoplasmic reticulum (b), and J (not labeled here) is something else. But the question is about labels A - I.

So the answers:

1. A: g (cell membrane)
2. B: h (cell wall)
3. C: i (cytoplasm)
4. D: f (vacuole)
5. E: d (nucleus)
6. F: c (mitochondria)
7. G: e (centriole)
8. H: a (chloroplasts)
9. I: b (endoplasmic reticulum) Wait, but the option for I: the problem says "I (present in both cells - labeled in one)". So I is endoplasmic reticulum (b), which is present in both.

Wait, let's recheck each label:

- A: Cell membrane (g) – correct, as it's the membrane surrounding the cytoplasm in both cells (plant cell has cell wall outside, so A is cell membrane, B is cell wall).
- B: Cell wall (h) – plant cell's rigid layer, correct.
- C: Cytoplasm (i) – the fluid inside the cell, correct.
- D: Vacuole (f) – plant has large vacuole, animal has small, correct.
- E: Nucleus (d) – the round structure with nucleolus, correct.
- F: Mitochondria (c) – the oval structures with cristae, correct.
- G: Centriole (e) – the small structures near nucleus in animal cell, correct.
- H: Chloroplasts (a) – the structures with chlorophyll in plant cell, correct.
- I: Endoplasmic reticulum (b) – the network structure, present in both cells, labeled in animal cell, correct.

Answer:

1. A: g. cell membrane
2. B: h. cell wall
3. C: i. cytoplasm
4. D: f. vacuole
5. E: d. nucleus
6. F: c. mitochondria
7. G: e. centriole
8. H: a. chloroplasts
9. I: b. endoplasmic reticulum