One big reason for this is because individuals of the same species often have to fight over shared resources (this means shared food and shared environment).
Because they fight over a limited amount of space and food, competition between individuals within one species can be present and very tough.
On the other hand, having members of different species also possibly means different territories and different food sources. A lion has no quarrel with dolphins, while it can have a lot of fights with lions from different prides (large group of lions).
The <em>independent </em>variable is the variable that you change and control in your experiment. The <em>dependent</em> variable is the one you don't have control over and is affected by how the independent variable reacts.
For Example:
Let's say you're doing an experiment seeing how different sugars affect the density of cupcakes. The type of sugar you add would be the independent variable, because you are choosing it. The density would be the dependent variable, since it depends on the sugar used.
<span>Compared to their parents, the new cows are the same species with a different genetic makeup. All cows belong to the same species - Bos taurus species, according to Carl Linnaeus. So, even if this new cow is genetically modified, it would still beong to the same species. However, its genes wouldn't be the same as its parents, given that the scientists tampered with them, which is why it now has a different genetic makeup than its parents.</span>
They are called a population, because they are the same species living in a given area. The word population means the amount of a certain species living in a certain environment.
Eek
