Which of the following is the correct sequence in the increasing order of complexity ?

Options

A. molecules, tissues, community, population
B. cell, tissues, community, population
C. tissues, organisms, population, community
D. molecules, tissues, community, cells

Answer

To determine the correct sequence in the increasing order of complexity among biological structures, we need to understand the hierarchy of biological organization. Here’s a step-by-step breakdown:

### Step 1: Identify the Basic Unit of Life
- The basic unit of life is the **cell**. Cells are the smallest structural and functional units of living organisms.

### Step 2: Group of Cells
- When cells group together, they form **tissues**. Tissues are composed of similar cells that work together to perform a specific function.

### Step 3: Group of Tissues
- Different types of tissues combine to form an **organ**. An organ is a structure made up of different tissues that work together to perform a specific function.

### Step 4: Group of Organs
- Several organs that work together to perform complex functions form an **organ system**. For example, the digestive system is made up of various organs like the stomach, intestines, and liver.

### Step 5: Group of Organ Systems
- Multiple organ systems together make up an **organism**. An organism is a complete living entity that can function independently.

### Step 6: Group of Organisms
- A group of organisms of the same species living in a particular area is called a **population**.

### Step 7: Group of Populations
- Different populations that live together in a specific area form a **biological community**. This includes various species interacting with one another.

### Conclusion
Based on the hierarchy of biological organization, the correct sequence in increasing order of complexity is:
1. Cell
2. Tissue
3. Organ
4. Organ System
5. Organism
6. Population
7. Community

### Final Answer
The correct sequence in the increasing order of complexity is: **Tissue → Organism → Population → Community**.

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