An ecological niche is an organism's specific habitat in an ecosystem.
It is where it lives and feeds, etc.
The two jet streams that affect our weather in the continental US are the polar jets and the subtropical<span> jets. They are responsible for transporting weather systems that affect us. The polar front is the boundary between the cold North Pole air and the warm equatorial air</span>
Answer:
yes evolution do exist in nowadays also.
Positive feedback is a control system that sends a signal to ( increase) a response.