There are billions of possible combinations of DNA that determine specific traits in humans, so that no two non-twin humans share the same sequence. Add to this the variations in growth rates and development in the womb, and it is statistically improbable that any two living humans would be physically indistinguishable. However, given a large enough population (trillions of people rather than billions) the likelihood would be greater.
They have different genes just as humans do.
The atoms of each element have a number of protons that is unique to each element. The number of protons makes one atom different from another.
The atoms of each element have a number of protons that is unique to each element. The number of protons makes one atom different from another.
Personality
They have different genes just as humans do.
Special.
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Arrangement of particles
What makes the Amoses Deza Malone and her mom and Mr. Lewis and the sleets different from one another?
An anthropologist studies human development and how humans relate to one another in different cultures and societies. They analyze social customs, beliefs, and behaviors to gain insights into the diversity of human experiences.
Clothing, music, language, hobbies.