Compare and contrast prokaryotes and eukaryotes using the Venn diagram.

Let's solve this step by step.

We are asked to compare and contrast prokaryotes and eukaryotes using a Venn diagram. The goal is to place the correct terms from the word bank into the appropriate sections of the diagram:

- Left circle (Prokaryotes only)
- Right circle (Eukaryotes only)
- Overlap (Shared features)

---

🔍 Step 1: Understand the key differences

| Feature | Prokaryotes | Eukaryotes |
|--------|-------------|------------|
| Nucleus | ✘ No nucleus | ✔ Has a nucleus |
| DNA location | Free-floating in cytoplasm | DNA enclosed in nucleus |
| Organelles | No membrane-bound organelles | Has membrane-bound organelles (e.g., mitochondria, ER) |
| Complexity | Simple cell structure | Complex cell structure |
| Cell type | Mostly unicellular | Unicellular and multicellular |
| Ribosomes | Present | Present |
| Cytoplasm | Present | Present |
| Cell membrane | Present | Present |

---

🧩 Step 2: Analyze each term from the word bank

Here’s the word bank:
- No Nucleus
- Nucleus
- Organelles
- Simple
- Complex
- Cytoplasm
- Free DNA
- DNA in nucleus
- Ribosomes
- Unicellular
- Cell membrane
- Unicellular & Multicellular

Now let's classify them:

#### ✔ Shared by both (Overlap):
These are features common to both prokaryotes and eukaryotes:
- Cytoplasm – Both have cytoplasm.
- Ribosomes – Both have ribosomes for protein synthesis.
- Cell membrane – Both have a cell membrane.
- Unicellular – While many eukaryotes are multicellular, some are unicellular, and prokaryotes are mostly unicellular, so "unicellular" is shared.
- But note: “Unicellular & Multicellular” is more specific to eukaryotes. So we'll keep that separate.

Wait — let's be careful:
- Unicellular → applies to both (many bacteria are unicellular; some protists too)
- But "Unicellular & Multicellular" → only eukaryotes can be multicellular (like animals, plants), so this is only eukaryotes

So:
- Unicellular → shared? Actually, yes — many prokaryotes are unicellular, and many eukaryotes are too. So "Unicellular" could go in the overlap.

But the word bank has two entries:
- Unicellular
- Unicellular & Multicellular

So:
- Unicellular → both have unicellular forms → overlap
- Unicellular & Multicellular → only eukaryotes → eukaryotes only

Also:
- Ribosomes → both have them → overlap
- Cytoplasm → both have it → overlap
- Cell membrane → both have it → overlap

So far:
> Overlap: Cytoplasm, Ribosomes, Cell membrane, Unicellular

---

#### 🔹 Prokaryotes Only:
Features unique to prokaryotes:
- No Nucleus → prokaryotes lack a nucleus
- Free DNA → DNA floats freely in cytoplasm
- Simple → simpler structure than eukaryotes
- Unicellular → already placed in overlap? Wait — but most prokaryotes are unicellular, but so are some eukaryotes. So "Unicellular" is shared.

But the word "Unicellular" is listed separately — so we can use it in the overlap.

But what about "Unicellular & Multicellular"? That’s only for eukaryotes.

So:
- No Nucleus → Prokaryotes only
- Free DNA → Prokaryotes only
- Simple → Prokaryotes only

✔ Prokaryotes Only:
- No Nucleus
- Free DNA
- Simple
- Unicellular? Wait — if we put "Unicellular" in overlap, then it's shared.

But technically, all prokaryotes are unicellular, and many eukaryotes are too. So yes, "Unicellular" goes in overlap.

So prokaryotes only:
- No Nucleus
- Free DNA
- Simple

---

#### 🔸 Eukaryotes Only:
- Nucleus → present in eukaryotes only
- Organelles → membrane-bound organelles like mitochondria, Golgi, etc.
- Complex → more complex structure
- DNA in nucleus → DNA is enclosed in nucleus
- Unicellular & Multicellular → eukaryotes include both types (e.g., amoeba vs. humans)

✔ Eukaryotes Only:
- Nucleus
- Organelles
- Complex
- DNA in nucleus
- Unicellular & Multicellular

---

✔ Final Classification:

#### 🟦 PROKARYOTES (left circle):
- No Nucleus
- Free DNA
- Simple

#### 🟨 EUKARYOTES (right circle):
- Nucleus
- Organelles
- Complex
- DNA in nucleus
- Unicellular & Multicellular

#### 🟩 OVERLAP (shared):
- Cytoplasm
- Ribosomes
- Cell membrane
- Unicellular

> Note: Although "Unicellular" applies to both, "Unicellular & Multicellular" is exclusive to eukaryotes because multicellularity evolved in eukaryotes.

---

✔ Final Answer: Venn Diagram Fill-In

```
PROKARYOTES EUKARYOTES
------------------- -------------------
| | | |
| No Nucleus | | Nucleus |
| Free DNA | | Organelles |
| Simple | | Complex |
| | | DNA in nucleus|
| | | Unicellular & |
| | | Multicellular |
| | | |
------------------- -------------------
\___________________________/
OVERLAP
--------------------
| |
| Cytoplasm |
| Ribosomes |
| Cell membrane |
| Unicellular |
| |
--------------------
```

---

📝 Summary Explanation:

- Prokaryotes are simple, lack a nucleus, and have free-floating DNA. They are typically unicellular.
- Eukaryotes have a nucleus, membrane-bound organelles, and more complex structures. They can be unicellular or multicellular.
- Shared features include cytoplasm, ribosomes, cell membrane, and the fact that both include unicellular organisms.

This Venn diagram clearly shows how the two cell types differ and overlap in structure and function.