Regions with a polar climate are characterized by a lack of warm summers. What are the two sub-types of a polar climate?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Which of the following units is not an official si unit? mole liter kilogram ampere

Which of the following describes a situation where competition between producers exists