Eukaryotic organisms have different levels of organization . Select thecombination where the levels are arranged in the descending order .

Options

A. DNA, chromosome ,cell, nucleus ,tissue
B. Tissue ,cell, nucleus ,chrommosome , DNA
C. Nucleus ,cell, DNA, chromosome, tissue
D. Tissue ,cell , chromosome ,nucleus ,DNA

Answer

To solve the question regarding the levels of organization in eukaryotic organisms, we need to arrange the biological structures in descending order from the most complex to the simplest. Here’s a step-by-step breakdown:

### Step-by-Step Solution:

1. **Identify the Highest Level of Organization**:
- The highest level of organization in eukaryotic organisms is the **Organism** itself. This is the complete living entity.

2. **Next Level - Organ Systems**:
- The organism is made up of various **Organ Systems** (e.g., digestive system, respiratory system). These systems work together to maintain life.

3. **Next Level - Organs**:
- Each organ system consists of **Organs** (e.g., heart, lungs, stomach). Each organ has a specific function within the system.

4. **Next Level - Tissues**:
- Organs are made up of different types of **Tissues** (e.g., muscle tissue, nervous tissue). Tissues are groups of similar cells that perform a specific function.

5. **Next Level - Cells**:
- Tissues are composed of **Cells**, which are the basic unit of life. Each cell can perform all necessary life processes.

6. **Next Level - Organelles**:
- Within each cell, there are various **Organelles** (e.g., nucleus, mitochondria) that perform specific functions necessary for the cell's survival.

7. **Next Level - Molecules**:
- Organelles are made up of **Molecules** (e.g., proteins, lipids), which are combinations of atoms.

8. **Lowest Level - Atoms**:
- Finally, the simplest level is **Atoms**, which are the building blocks of all matter.

### Final Arrangement in Descending Order:
- Organism
- Organ System
- Organ
- Tissue
- Cell
- Organelle
- Molecule
- Atom