1) control - does not get independent variable 2) experimental - gets the independent variable 3) independent variable - is being changed/controlled 4) dependent - is being tested
I think your talking about the lungs
they are caused by mutation. the best example of it are human blood groups.
<span>The birth rate decreased, while the death rate increased.</span>
Answer:
Ribbon Snakes, American Water Snakes and European Grass Snakes
Explanation:
These are a few snakes thaat don't eat rodents, but eat fish.
