arbon, as with many elements, can arrange its atoms into several different geometries, or "allotropes." In pure diamond, every carbon atom is covalently bonded to exactly 4 other carbon atoms in a very specific and energetically favorable geometry. The diamond cannot be broken or scratched unless many covalent bonds are broken, which is difficult to do. In another common allotrope, graphite, every carbon atom is covalently bonded to only 3 other carbon atoms, and the atoms are arranged in sheets that are not covalently bonded to each other. The sheets can be broken apart easily, ultimately meaning that graphite can be easily scratched. Coal is composed of particles of different allotropes of carbon, and some "amorphous carbon," which has no defined geometry in its atomic structure. Without a continuous network of covalent bonds, coal is easily scratched (i.e. it is not hard).
Here you go C <span>storm surge</span>
Answer:
D: All levels contain the same amount of energy
Explanation:
This is due to how the number of animals also increase as the energy pyramid level decreases.
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Answer: Impetigo
The physical findings of
impetigo includes small,
red macule or vesicle that becomes pustular within a few hours and ruptures when
bacteria inoculate traumatized skin cells. This is visible primarily on the face and
extremities that characterized thick, honey-colored crust formed from the
exudate.
In addition, this is a highly contagious infection of the superficial layers of the epidermis
and primarily caused by Streptococcus pyogenes or Staphylococcus aureus.
Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment and are more likely to survive and pass on the genes that aided their success. This process causes species to change and diverge over time.
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