Which has higher air pressure-warm air or cold alr? How do you know?

Air lower in the atmosphere is more dense than air above, so air pressure down low is greater than air pressure higher up. ... Since warm air is less dense and creates less air pressure, it will rise; cold air is denser and creates greater air pressure, and so it will sink.

Explanation:

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.