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Karolina [17]
3 years ago
8

Which event always involves a chemical change ?

Biology
2 answers:
Paha777 [63]3 years ago
8 0

Answer:

Burning

Explanation:

Did the quiz

Ad libitum [116K]3 years ago
4 0
Burning making a pancake from batter is an example of an change.
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In sickle-cell disease, variation in one gene causes red blood cells to bend, or sickle. This means the sickled cells _____.
Savatey [412]

Answer:

A case study of the effects of mutation: Sickle cell anemia. Sickle cell anemia is a genetic disease with severe symptoms, including pain and anemia. The disease is caused by a mutated version of the gene that helps make hemoglobin — a protein that carries oxygen in red blood cells.

Explanation:

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2 years ago
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Answer:

protiens

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in protiens in cells have nightogen

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Explain how the ages of the rocks on the ocean floor support the theory of seafloor spreading​
Dafna11 [192]

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Explanation:

The formation of crusts of ocean by the process of volcanic eruptions in the ridges of the middle ocean is the theory of seafloor spreading proposed by Hammond Hess. The movement of tectonic plates continuously forms sea floors through spreading of seafloor.  The several evidences in support of this theory has been seen, of which some are – molten material eruptions, magnetic stripes in rocks and rock ages.

The drilling evidence is the final one that was proved by taking samples of rock by drilling in ocean and by bringing them with pipes. The observation of these rocks proved that older rocks were collected from farther ridges and youngers are found in the central ridges.  

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Explanation on Mitosis​
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Anaphase: sister chromatids are pulled apart from each other towards opposite sides of the cell
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They will be clean from all salt because the new water contains no salt 
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