Here's a breakdown:
* Species: A group of organisms that can reproduce with each other and create fertile offspring. This is the key defining characteristic.
* Population: A group of individuals of the same species living in a particular area.
* Number of individuals: A species can have a population of just a few individuals (like an endangered species) or millions (like certain insects).
It's NOT about the number. Even if you have two animals that look alike, if they can't reproduce and create fertile offspring, they are different species.
Think of it like this: If you have a group of dogs, they are all the same species, but they might be different breeds (like a poodle and a German Shepherd). They are all dogs, but they look different and might have different characteristics.
Let me know if you have any more questions!
