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umka21 [38]
3 years ago
7

Which two pieces of equipment did the geologist most likely use to determine the density of the copper nuggets?

Biology
1 answer:
zhuklara [117]3 years ago
7 0
A glass flask and sodium and hydrogen hope it helped
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S Proteins are made up of monomers<br> called:
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Which of the following is a chemical reaction?
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Evaporation of alcohol
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A sample of DNA is collected from an organism. It is analyzed and determined that 20% of the DNA is made up of the base adenine.
AnnyKZ [126]

Answer:

The correct answer is -

Thymine: 20%

Guanine: 30%

Cytosine: 30%

Explanation:

According to Chargaff's rule which states that the purine residues are equal to the pyrimidines residue in DNA sample which means A+G = T+C where A is adenine, G is guanine, C is cytosine and T is thymine. It is also known that A is always equal to T and C is equal to G.

So, A+G+T+C = 100

20+20+G+C

100-40 = G+C

60= G+C

as we know G is equal to C similarly A is equal to T

Thus, G = C= 30%

    A= T= 20%

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Dunng osmosis, in which direction do the water molecules diffuse across a cell membrane?
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It flows from a high to low concentration gradient across the membrane.
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