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Wittaler [7]
3 years ago
9

What causes a star to shine brightly?

Biology
2 answers:
bogdanovich [222]3 years ago
5 0

Answer:

d

Explanation:

Neporo4naja [7]3 years ago
4 0
The types of elements that are present
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13. When one or more chromosomes fail to separate properly this is:
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Answer:

The answer is B

Explanation:

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2 years ago
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Both coal and diamonds are forms of elemental carbon. Coal is brittle while diamonds are considered to be the hardest Of all sub
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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).



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3 years ago
Much like a cell, a virus is able to
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Much like a cell, a virus is able to grow and reproduce in large numbers

A virus is a microscopic nonliving parasite that only reproduces inside the cells of living hosts. Like cells, viruses have the ability to grow and reproduce within the host cell. When a virus infects a host cell, it injects its genetic material into the cell and forces the host cell to produce thousands of similar copies of the original virus.

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The transmission of genetic information from parent to offspring is called _______. A. heredity B. homeostasis C. cellular organ
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The answer is A. heredity
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2 years ago
A mixture of the amino acids leucine, glutamate, and arginine, is added to a cation exchange column at neutral ph. in what order
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Cation-exchange chromatography is used when the molecule of interest is positively charged, the stationary phase is negatively charged and positively charged molecules are loaded to be attracted to it. So, the amino acids with negative charge will elute the first. Glutamate, leucin, arginine is the order of elution because of their pI values ~3,  ~6  ~10.

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