Which of these is a similarity between a polar and a subtropical jet stream? Both bring in cool air from the poles.
Both are formed at latitudes close to the poles.
Both are formed at latitudes close to the equator.
Both are formed at the boundary of warm and cool air masses.

i am going to guess that it is co2.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a