What is the correct order in decreasing size in taxonomic hierarchy ?

Options

A. Kingdom , phylum, class , order , family, genus and species
B. Kingdom , phylum, class , order , family, species and genus.
C. Kingdom , phylum, class ,species, order, family and genus.
D. Kingdom, species , phylum, class , order, family and genus .

Answer

To determine the correct order in decreasing size in the taxonomic hierarchy, we need to understand the levels of classification in biology. The taxonomic hierarchy consists of several ranks, which are organized from the broadest category to the most specific. Here’s how we can break it down step by step:

### Step-by-Step Solution:

1. **Identify the Highest Rank**: The highest rank in the taxonomic hierarchy is the **Kingdom**. This is the broadest category that includes a large number of organisms.

2. **Next Rank**: Following the kingdom, the next level is **Phylum**. Each kingdom is divided into multiple phyla.

3. **Third Rank**: After phylum, we have **Class**. Each phylum is further divided into classes.

4. **Fourth Rank**: The next level is **Order**. Each class is divided into orders.

5. **Fifth Rank**: Following order, we have **Family**. Each order is made up of multiple families.

6. **Sixth Rank**: The next level is **Genus**. Each family contains several genera (plural of genus).

7. **Lowest Rank**: Finally, the smallest unit in the taxonomic hierarchy is **Species**. Each genus is made up of different species.

### Correct Order:
Putting it all together, the correct order in decreasing size in the taxonomic hierarchy is:
**Kingdom > Phylum > Class > Order > Family > Genus > Species**

### Conclusion:
The correct answer is the first option: **Kingdom, Phylum, Class, Order, Family, Genus, Species**.