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seropon [69]
3 years ago
6

Volcanic ash has occasionally formed molds of animals. this occurs when the ash covers the animal and -

Biology
1 answer:
ANEK [815]3 years ago
4 0

Out of the following given choice;

F.  replaces the animal's soft tissues.

G.  enters the animal's body cavity.

H.  hardens before the animal decays.

J.  mineralizes the animal's bones.

The answer H. This can be caused by hot pyroclastic flows or falling volcanic ash from the atmosphere following a volcanic eruption. The ash buries animals and plants intact without moving them and without completely crushing or burning them. Over time excess silica dissolved in the water often replaces soft bone materials molecule by molecule, creating an almost indestructible fossil (like petrified wood) that lasts for millions of years






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In the outbreak of malaria, the frequency of the recessive allele for the HbS gene will increase. The correct option is A.

<h3>What is the HbS gene?</h3>

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It causes sickle cell disease in humans.

The disease is expressed by two HbS variants or one HbS variant or one another beta-globin gene.

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Thus, the correct option is A, the frequency will increase.

Learn more about HbS gene

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1. As temperature and pressure increases, density increases

Explanation:

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Did deletion of any of the possible control elements cause a reduction in reporter gene expression? how can you tell?
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