Okay, kiddo. You know how our bodies have cells, right? And inside those cells, there's this cool thing called mitochondria. Mitochondria are like little energy factories that help our cells work properly.
Now, usually mitochondria only come from our moms. They get passed down from generations of moms to their babies. But sometimes, something weird happens.
Sometimes, a cell from one organism can take in some mitochondria from a different organism. It's like the cell is saying, "Hey, those mitochondria are cool, can I have some?"
This is what we call horizontal transfer of mitochondria. It's like sharing mitochondria between different cells or organisms.
Scientists aren't exactly sure why this happens, but they think it might be because cells need different types of mitochondria to adapt to different environments. Plus, it's helpful for cells to have more energy factories to help them function properly.
So, horizontal transfer of mitochondria is like cells sharing their cool energy factories with each other. It's kind of like trading pokemon cards, but with tiny organelles inside cells instead. Pretty neat, huh?