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seropon [69]
3 years ago
5

You are exploring in a cave and call out to one of your friends. You hear your echo. Which interaction of sound (reflection, ref

raction or absorption) caused the echo and how did the sound waves move?
Biology
1 answer:
RideAnS [48]3 years ago
8 0
When sound waves hit a solid surface they either reflect, refract, or absorb.
Echo's are caused by the reflection of sound waves.
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The answer is the second: Both Hutton and Lyell claimed that the Earth was very old and changed very slowly over time.

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DNA sometimes has chemical groups attached, called methyl groups, that affect gene expression. Suppose that, during each hour, f
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f = m - u

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DNA methylation is an important epigenetic modification associated with the regulation of gene expression. As such, the analysis of DNA methylation marks and the dynamics of this process may shed light on the genes that are being expressed at a given time in a given cell type/tissue. In the example above described, f is defined as the fraction of the DNA molecule that is methylated after one (1) hour, whose value can be estimated by subtracting u fraction (i.e., fraction of methylated locations that become unmethylated) from m fraction (i.e., fraction of unmethylated locations that become methylated).

In consequence, the equation is

f = m - u

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