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Andrej [43]
3 years ago
13

Tại sao tóc có mầu đen

Biology
1 answer:
Akimi4 [234]3 years ago
6 0

Answer:

Melanin is responsible for black colour of hair.

Explanation:

Hair is black in colour because it is determined by the amount of a pigment present in hair is called melanin. If eumelanin which is a type of melanin, present in hair, it gives people black or brown hair. If the receptor is not activated or is blocked in the hair, then melanocytes make pheomelanin instead of eumelanin and then the black or brown hair colour did not occurs so we can conclude that melanin is responsible for black colour of hair.

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<span>According to the nebular theory stars are formed in which sequence: 
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b.Clumps - as the gases start to form and come together they form clumps of gases that are highly concentrated and they start to grow.

c. Gravitational forces - when clumps have grown into big sizes the gravitational forces that are found within it increases and are converted into kinetic energy of fast-moving particles that continuously bump into each other and create or generate heat. 
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d. Nuclear fission - as the clumps keep on colliding and creating heat (18 million degrees Fahrenheit), nuclear fission begins. 

e. Outward pressure from the nuclear fission prevents the collapse of the gases, stabilizing the gases eventually creating a star. </span>
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