Diagram illustrating the phases of the cell cycle, including interphase and mitosis, with cells labeled A through F.

Let’s go step by step through the worksheet.

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Matching Section:

We match each description to the correct phase of mitosis or interphase.

1. The sister chromatids move apart → This happens in Anaphase (E)
2. New nuclear membrane forms around the chromosomes → Happens in Telophase (C)
3. The cytoplasm of the cell divides → That’s cytokinesis, which usually follows telophase — but since it’s not listed as a separate option, and often grouped with telophase, we’ll note that this is *not* one of A–E directly. But looking at options, none say “cytokinesis”. Wait — actually, in many worksheets, they consider cytokinesis part of telophase for simplicity. But let’s check: The question says “match the term to the description” and gives only A–E. So perhaps #3 is meant to be matched with Telophase? Actually, no — cytokinesis is separate. Hmm. Let’s look again.

Wait — maybe I misread. The matching section has 10 items, and only 5 terms (A–E). That means some terms are used more than once? Or maybe it’s a typo? No — looking closely, the worksheet lists:

Matching: match the term to the description
A. Prophase
B. Interphase
C. Telophase
D. Metaphase
E. Anaphase

Then 10 descriptions. So yes, some phases will be used multiple times.

Let’s do them carefully:

1. Sister chromatids move apart → Anaphase (E) ✔
2. New nuclear membrane forms → Telophase (C) ✔
3. Cytoplasm divides → This is cytokinesis, which occurs after mitosis. Since it’s not listed, but often associated with telophase in basic bio, we might put C (Telophase) — BUT technically, it’s not part of mitosis. However, in many school worksheets, they include it under telophase. Alternatively, maybe they expect us to know it’s not among A-E? That can’t be. Let’s see other clues.

Actually, rechecking standard curriculum: In many middle/high school biology classes, they teach that cytokinesis happens during telophase. So we’ll assign #3 → C (Telophase) for now.

4. Chromosomes become invisible → They decondense in Telophase (C) → so C
5. Chromosomes located at equator → Metaphase (D) ✔
6. Chromosomes moving toward poles → Anaphase (E) ✔
7. Chromosomes not visible → During Interphase (B), DNA is chromatin, not condensed chromosomes → B
8. DNA is replicated → Happens in S phase of Interphase → B
9. Cell grows in size → Also during Interphase (G1 and G2) → B
10. Cell prepares for mitosis → That’s G2 phase of Interphase → B

So summary for Matching:

1. E
2. C
3. C *(assuming cytokinesis tied to telophase)*
4. C
5. D
6. E
7. B
8. B
9. B
10. B

But wait — #3: “The cytoplasm of the cell divides” — strictly speaking, that’s cytokinesis, which is NOT part of mitosis (mitosis = nuclear division), but part of the cell cycle. Since the worksheet includes “cell cycle” later, and the matching is labeled “THE CELL CYCLE WORKSHEET”, maybe they want us to associate it with telophase? Or perhaps there’s an error? Let’s hold that thought and move to diagram questions — maybe context helps.

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Diagram Questions:

First, identify what each diagram shows.

Diagrams labeled A through F.

From typical mitosis diagrams:

- D: Looks like interphase — nucleus intact, nucleolus visible, no chromosomes condensed → Interphase
- A: Chromosomes condensing, nuclear envelope breaking down → Prophase
- F: Chromosomes lined up at center → Metaphase
- C: Chromosomes being pulled apart? Wait — let’s describe:

Actually, let’s label properly based on standard stages:

Standard order: Interphase → Prophase → Metaphase → Anaphase → Telophase → Cytokinesis

Looking at diagrams:

- D: Large nucleus, diffuse chromatin → Interphase
- A: Chromosomes visible, nuclear envelope fragmenting, spindle forming → Prophase
- F: Chromosomes aligned at metaphase plate → Metaphase
- E: Sister chromatids separating, moving to opposite poles → Anaphase
- B: Two nuclei forming, cell pinching in middle → Telophase + Cytokinesis
- C: Wait — diagram C shows chromosomes still together but spindle attached? Actually, looking again — in diagram C, chromosomes are at equator? No — in diagram C, it looks like chromosomes are being pulled? Wait, let me think differently.

Actually, common labeling:

In many textbooks:

- Diagram with chromosomes scattered, nuclear envelope gone → Prophase (A)
- Chromosomes lined up single file at center → Metaphase (F)
- Chromatids separating → Anaphase (E)
- Two groups at poles, new membranes forming → Telophase (B)
- One big nucleus, no chromosomes → Interphase (D)
- What about C? Diagram C shows chromosomes at equator but with two sets? Wait — actually, diagram C might be late metaphase or early anaphase? No — let’s count:

Wait — diagram C: It shows chromosomes aligned at equator, but each chromosome has two chromatids, and spindles attached — that’s metaphase. But diagram F also shows alignment? Hmm.

Actually, looking at standard versions of this worksheet (this is a very common one):

Typical identification:

- D: Interphase
- A: Prophase
- F: Metaphase
- E: Anaphase
- B: Telophase/Cytokinesis
- C: ??? Wait — diagram C shows chromosomes at equator but with centromeres splitting? No — actually, in diagram C, it appears that chromosomes are at equator, but it's drawn with two rows? That doesn't make sense.

Wait — perhaps I have it wrong. Let me recall: In some versions, diagram C is anaphase? No.

Better approach: Use logic from questions.

Question 4: Which cell is in metaphase? → Should be the one with chromosomes lined up at equator → likely F

Question 5: Which cell is in anaphase? → Chromatids moving apart → E

Question 6: First phase of mitosis? → Prophase → A

Question 3: Cells A & F show different stages of same part — what phase is it? A is prophase, F is metaphase — both are part of mitosis (M phase)

Question 1: List diagrams in order from first to last in cell cycle.

Cell cycle order: Interphase → Mitosis (Prophase → Metaphase → Anaphase → Telophase) → Cytokinesis

So:

Start with D (Interphase)

Then A (Prophase)

Then F (Metaphase) — assuming F is metaphase

Then E (Anaphase)

Then B (Telophase/Cytokinesis)

What about C? Diagram C — if you look, it shows chromosomes at equator, but with two sets? Actually, in some diagrams, C is late metaphase or early anaphase? No — wait, in diagram C, the chromosomes are at the equator, but each chromosome is split? That would be anaphase. But E already shows separation.

I think there’s confusion. Let me look for a standard key.

Upon recalling, in this exact worksheet (commonly found online), the diagrams are:

- D: Interphase
- A: Prophase
- F: Metaphase
- C: Anaphase? No — wait, actually:

Wait — diagram C: It shows chromosomes at the equator, but with spindle fibers pulling — no, in diagram C, the chromosomes are aligned, but it's drawn with two layers? That might be a trick.

Actually, let's read the question: "Cells A & F show different stages of the same part of the cell cycle. What phase is it?"

If A is prophase and F is metaphase, then the "same part" is mitosis (or M phase).

Now, for diagram C — if we look at question 4: "Which cell is in metaphase?" — if F is metaphase, then C must be something else.

Perhaps diagram C is telophase? But B looks like telophase.

Another idea: Maybe diagram C is prometaphase? But that's not typically taught.

Let’s list all diagrams with best guess:

- D: Interphase (nucleus intact, no chromosomes)
- A: Prophase (chromosomes condensing, nuclear envelope breaking)
- F: Metaphase (chromosomes lined up at equator)
- E: Anaphase (sister chromatids separating)
- B: Telophase (two nuclei forming, cell dividing)
- C: ? — if we look at diagram C, it shows chromosomes at equator, but with centromeres split? No — actually, in diagram C, the chromosomes are at the equator, and it looks like they are about to separate — but that's still metaphase. Perhaps it's a duplicate? Unlikely.

Wait — I think I made a mistake. Let me describe diagram C: In many versions, diagram C shows the chromosomes at the equator, but with the spindle fully formed — that's metaphase. But diagram F also shows that? No — in diagram F, the chromosomes are lined up, and in diagram C, it might be that the chromosomes are at the equator but the cell is elongated?

Actually, upon second thought, in some worksheets, diagram C is anaphase because the chromatids are moving apart, but in this case, diagram E clearly shows that.

Perhaps diagram C is late prophase or prometaphase? But let's use the questions to guide us.

Question 4: Which cell is in metaphase? → Likely F (standard)

Question 5: Which cell is in anaphase? → E

Question 6: First phase of mitosis? → A (prophase)

Question 3: A and F are both in mitosis — so answer is mitosis or M phase

Question 1: Order of cell cycle: Start with interphase (D), then prophase (A), then metaphase (F), then anaphase (E), then telophase (B), and what about C? If C is not used, but it is included, perhaps C is cytokinesis? But B shows cytokinesis.

Wait — diagram B shows two cells forming, so that's end of telophase/cytokinesis.

Diagram C: Let's assume it's metaphase as well? But that can't be.

I recall now: In this specific worksheet, diagram C is anaphase, and diagram E is telophase? No, that doesn't fit.

Let's look at the number of chromosomes or shape.

Another approach: The cell cycle order should be:

1. Interphase (D)
2. Prophase (A)
3. Metaphase (F)
4. Anaphase (E)
5. Telophase (B)
6. Cytokinesis — but B already shows that.

What is C? Perhaps C is early anaphase or something, but let's see the answer expected.

Upon checking my memory, in this worksheet, the correct order is:

D (interphase) -> A (prophase) -> F (metaphase) -> C (anaphase) -> E (telophase) -> B (cytokinesis)

Is that possible? Let's verify:

- Diagram C: If it shows chromosomes moving apart, then it could be anaphase.
- Diagram E: If it shows two groups at poles, then telophase.
- Diagram B: Cell pinching, two nuclei — cytokinesis.

Yes, that makes sense. In some drawings, anaphase is shown with chromosomes halfway, and telophase with them at poles.

So let's redefine:

- D: Interphase
- A: Prophase
- F: Metaphase (chromosomes at equator)
- C: Anaphase (chromatids moving to poles)
- E: Telophase (chromosomes at poles, nuclear envelopes reforming)
- B: Cytokinesis (cell dividing into two)

That fits better.

So for question 1: Order from first to last in cell cycle: D, A, F, C, E, B

Question 2: Process by which nucleus divides to form two identical nuclei? → Mitosis

Question 3: Cells A & F show different stages of the same part — A is prophase, F is metaphase, both part of mitosis

Question 4: Which cell is in metaphase? → F

Question 5: Which cell is in anaphase? → C (based on above)

Question 6: First phase of mitosis? → A (prophase)

Question 7: Are the cells depicted plant or animal cells? → Look for centrioles or cell plate. In diagram B, the cell is pinching in the middle (cleavage furrow), which is characteristic of animal cells. Plant cells form a cell plate. So animal cells

Question 8: Longest phase of the cell cycle? → Interphase (includes G1, S, G2)

Question 9: Why is the cell cycle important? → For growth, repair, reproduction; ensures genetic material is copied and divided equally.

Question 10: At end of mitosis, how do chromosomes in daughter cell compare to parent cell? → Same number (identical)

Now back to matching section with this understanding.

For matching #3: "The cytoplasm of the cell divides" → This is cytokinesis, which is shown in diagram B, and in our matching, we don't have a term for it, but since it's part of the cell cycle, and telophase is when it starts, we'll keep it as C (Telophase) for school level.

But let's finalize matching with standard answers:

1. Sister chromatids move apart → Anaphase (E) — but in our diagram, anaphase is C, but the matching is for general terms, not diagram-specific. So for matching, it's still E for anaphase.

The matching is independent of the diagrams; it's general knowledge.

So for matching:

1. E (Anaphase)
2. C (Telophase)
3. C (Telophase) — as cytokinesis overlaps
4. C (Telophase) — chromosomes decondense
5. D (Metaphase)
6. E (Anaphase)
7. B (Interphase) — chromosomes not visible as discrete structures
8. B (Interphase) — DNA replication in S phase
9. B (Interphase) — cell growth in G1 and G2
10. B (Interphase) — preparation for mitosis in G2

This is consistent.

Now for diagram questions:

1. Order: D (interphase), A (prophase), F (metaphase), C (anaphase), E (telophase), B (cytokinesis) — so D, A, F, C, E, B

2. Process: Mitosis

3. Same part: Mitosis (or M phase)

4. Metaphase: F

5. Anaphase: C

6. First phase of mitosis: A

7. Plant or animal: Animal cells (because of cleavage furrow in B)

8. Longest phase: Interphase

9. Importance: For growth, repair, and reproduction; ensures each new cell gets a complete set of DNA

10. Chromosome number: The same as the parent cell

Now, let's write the final answers clearly.

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Final Answer:

Matching:
1. E
2. C
3. C
4. C
5. D
6. E
7. B
8. B
9. B
10. B

Diagram Questions:
1. D, A, F, C, E, B
2. Mitosis
3. Mitosis (or M phase)
4. F
5. C
6. A
7. Animal cells
8. Interphase
9. It allows organisms to grow, repair damaged tissues, and reproduce; ensures each new cell receives an exact copy of the DNA.
10. The daughter cells have the same number of chromosomes as the parent cell.