As a biologist with a focus on cellular and developmental biology, I can provide a comprehensive perspective on the question of whether an egg is a living or non-living thing. The classification of an egg as living or non-living is a nuanced one, as it depends on the specific context and the criteria used to define life.

**Step 1: Understanding the Concept of Life**
Before we can classify an egg, we must first understand the characteristics that define life. There are several criteria that are commonly accepted as indicators of life, including:


1. Cellularity: Organisms are composed of one or more cells.

2. Metabolism: Living organisms have metabolic processes that allow them to grow, reproduce, and maintain homeostasis.

3. Homeostasis: The ability to maintain a stable internal environment despite changes in the external environment.

4. Growth: Living organisms can increase in size or number of cells.

5. Response to stimuli: Organisms can react to changes in their environment.

6. Reproduction: Living organisms have the capacity to produce offspring.
7.
Evolution: Organisms have the ability to change over time through genetic variation and natural selection.

Step 2: The Egg as a Cell
An egg, whether from a bird, reptile, amphibian, or mammal, is a single cell or a collection of cells, depending on the species. In mammals, the egg is a single cell known as the ovum. In other animals, it may be a more complex structure, but it still fundamentally operates as a cell or a group of cells.

Step 3: Fertilized vs. Unfertilized Eggs
The distinction between a fertilized and an unfertilized egg is crucial. A fertilized egg is a zygote, which has resulted from the union of a sperm and an egg. It has the potential to develop into a new organism and exhibits all the characteristics of life mentioned earlier. An unfertilized egg, while still a cell or a collection of cells, does not exhibit all the characteristics of life on its own. It is in a state of suspended animation, waiting for fertilization to begin the process of development.

Step 4: The Potential for Life
The potential for an egg to become a living organism is a significant factor in considering its classification. An unfertilized egg has the potential to develop into a living organism if it is fertilized. This potential is a key aspect of what many consider to be life. However, without fertilization, it does not actively exhibit the characteristics of life, such as metabolism or growth.

**Step 5: Ethical and Philosophical Considerations**
The classification of an egg also involves ethical and philosophical considerations. Different cultures and ethical frameworks may have varying views on when life begins, which can influence the classification of an egg.

Conclusion
In conclusion, an egg can be considered a living thing, especially when it is fertilized, as it then exhibits all the characteristics of life and has the capacity to develop into a new organism. An unfertilized egg, while it has the potential for life, does not actively display all the characteristics of life and can be considered to be in a state between living and non-living. The classification of an egg is complex and depends on the criteria used to define life, the context in which the egg is being considered, and the ethical and philosophical perspectives of the observer.

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Egg, no matter fertilized or unfertilized, is made up of cells. Each cell satisfies the above 7 criteria for defining an organism to be living. Hence an egg should be classified as a living thing.May 4, 2018read more >>