All living organisms are linked to one another because

Options

A. they have common genetic material of the same type
B. they share common genetic material but to varying degrees
C. all have common cellular organisation
D. All of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks why all living organisms are linked to one another. This implies a need to explore the commonalities among different species.

2. **Identifying Common Features**: The primary reason for the connection among all living organisms is the presence of common genetic material. This includes DNA (Deoxyribonucleic Acid) and RNA (Ribonucleic Acid).

3. **Role of Genetic Material**: DNA and RNA are fundamental to all life forms. They carry the genetic instructions used in growth, development, functioning, and reproduction of all living organisms. This shared genetic material indicates a common ancestry.

4. **Variation Among Organisms**: While all living organisms share DNA and RNA, they also exhibit variations. These variations arise due to mutations, environmental factors, and evolutionary processes, which lead to the diversity of life forms we see today.

5. **Conclusion**: In summary, all living organisms are linked to one another because they share common genetic material (DNA and RNA), despite the variations that exist among them.

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