Observe the list of organism given below:
arabidopsis , Caenorhabditis , Sunflower , Drosophila , Honey bee, Rice , Wheat , Human , Yeast
How many of the given organism genome has been completely sequenced ?

Options

A. 6
B. 4
C. 7
D. 5

Answer

To determine how many of the given organisms have had their genomes completely sequenced, we will examine each organism in the provided list:

1. **Arabidopsis**: The complete genome was sequenced in 2000.
2. **Caenorhabditis**: The complete genome was sequenced in 1998.
3. **Sunflower**: The genome has not been completely sequenced.
4. **Drosophila**: The complete genome was sequenced in 2000.
5. **Honey bee**: The genome has not been completely sequenced.
6. **Rice**: The complete genome was sequenced in 2002.
7. **Wheat**: The genome has not been completely sequenced.
8. **Human**: The complete genome was sequenced in 2003 as part of the Human Genome Project.
9. **Yeast**: The complete genome was sequenced in 1996.

Now, let's count the organisms that have had their genomes completely sequenced:

- Arabidopsis: Yes
- Caenorhabditis: Yes
- Sunflower: No
- Drosophila: Yes
- Honey bee: No
- Rice: Yes
- Wheat: No
- Human: Yes
- Yeast: Yes

Counting these, we find that the following organisms have had their genomes completely sequenced:

1. Arabidopsis
2. Caenorhabditis
3. Drosophila
4. Rice
5. Human
6. Yeast

Thus, the total number of organisms with completely sequenced genomes is **6**.

### Final Answer:
**6 organisms have had their genomes completely sequenced.**

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