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Horizontal
1. Unión de dos o mas elementos
2. Electrón en el último nivel
3. Sustancia pura representada en la tabla
periódica
Vertical
1. Enlace que comparten electrones
2. Subpartícula con carga negativa
3. Elemento esencial para la vida
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Pronar un acróstico con la nalabra ELECTRÓN

Interacting group of various species in a common location. for example, a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes a biological community.

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.