A) Quartz is a <span>Elongated, six-sided crystals
Hope this helps!</span>
Nivel subatómico: lo integran las partículas más pequeñas de la materia, como son los protones, los neutrones y los electrones.
Nivel atómico: lo componen los átomos, que son la parte más pequeña de un elemento químico que puede intervenir en una reacción.
Nivel molecular: está formado por las moléculas, que se definen como unidades materiales formadas por la unión, mediante enlaces químicos, de dos o más átomos, como por ejemplo una molécula de oxígeno (O2) o de carbonato cálcico (CaCO3).
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The most appropriate answer would be d. Serotonin and norepinephrine
The mechanism that cause depression is not clear, but it is known that the patient has lower level of serotonine, norepinephine and dopamine. The primary drug used for depression is selective serotonine reuptake inhibitor(SSRI), so you could infer that serotonine level is lower in those patient. There is also serotonine norepinephrine reuptake inhibitor(SNRI) drug used for depression.
<span>If one sample of DNA was cut with BamHI and another with BclI, and these two samples were mixed and treated with DNA ligase, this would most probably occur:
</span><span>Both BamHI-cut and BclI-cut DNAs would be ligated with no preference for which fragment is ligated to which other.</span>
