Neon's outer energy level contains ______two________ electrons.
The correct answer is D.
A keystone specie refers to a plant or animal which play very important roles in the way a particular ecosystem functions. Without the keystone specie the ecosystem will be totally different or even cease to exist, thus keystone species have strong influence on the ecosystems in which they exist. Most of the time a keystone specie is a dominant predator whose removal allow a prey population to increase dramatically in size and thus reduce the overall diversity in that particular ecosystem.
Answer:
it gets useful energy by the creation of sugar molecules through the process of Photosynthesis.
Explanation:
<span> most of the sun's X- rays are absorbed in Earth's thermosphere
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