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Romashka-Z-Leto [24]
3 years ago
13

Dentre as alternativas a seguir,a única que é uma mistura é: ( )Um átomo de oxigenio ( )Àgua destilada ( )O ar atmosférico ( )O

gás ozoio me ajudem por favor...
Biology
1 answer:
riadik2000 [5.3K]3 years ago
7 0

Answer:

Atmospheric air  

Explanation:

Atmospheric air is a mixture of nitrogen, oxygen, argon, and small amounts of other gases.

A is wrong. A flask of oxygen atoms has nothing else in it. The O atoms are a pure substance.

B is wrong. A flask of distilled water contains only water. The water is a pure substance.

D is wrong. A flask of ozone contains only ozone. Ozone is a pure substance,

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How can organisms be so unique if the nucleotides making up dna are all the same between organisms?
sergejj [24]

Answer:

All organisms are made up of the four nucleotide bases of the DNA. Yet still all organisms are different from one another due to the sequence of the arrangement of these nucleotides. The pattern of arrangement of the nucleotides determines which organisms will be more similar and which will be more different from one another. The pattern of arrangement leads to the formation of genetic code which will differ in organisms. Hence, all organisms are made of the 4 nucleotides but differ due to the pattern of arrangement of the nucleotides.

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3 years ago
Researchers noted that when a lysine residue on a histone is acetylated, its side chain becomes neutral in charge. Combined with
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Answer:

The correct answer is A) Histone deacetylation generally decreases gene expression.

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