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Ivan
2 years ago
15

In which human activity has had the greatest impact on increasing mercury levels

Biology
1 answer:
ale4655 [162]2 years ago
7 0
The operation of coal fired power plants has had the greatest impact on increasing mercury levels.
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Primary succession ______.
Jet001 [13]
C) Occurs in areas without soil.
Primary succession occurs in lifeless areas in which <span>soil that is incapable of sustaining life is formed due to lava, sand dunes, and </span><span>rocks left from a retreating glacier.</span>
4 0
3 years ago
Besides being slow to reproduce, what else could make a population susceptible to being endangered?
alexdok [17]
Loss of habitat from any number of causes is the main reason for species endangerment currently.
5 0
3 years ago
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Why do classification systems change over time?
Sophie [7]

Answer:

Classification system changes because the scientists find new evidence in their studies.

Explanation: The world is always changing and growing and dying as well as developing, so over time things change. For example, as you grow up do you stay the same? No, you notice the physical changes happening, well thats sort of like how the earth and its ways are always changing as well.

4 0
2 years ago
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Predict the dominant type of bonding by considering electronegativity.
Vlad1618 [11]
If the atoms that are bonding have identical electronegativities, then it's a completely nonpolar covalent bond. This doesn't happen in the real world unless the two atoms are of the same element. In a practical sense, any two elements with an electronegativity difference less than 0.3 is considered to be nonpolar covalent.
As the difference between the atoms increases, the covalent bond becomes increasingly polar. At a polarity difference of 1.7 (this changes depending on who you ask) we consider it no longer to be a covalent bond and to be the electrostatic interactions characteristic in an ionic compound.
Just so you know, you shouldn't take these values as exact. ALL interactions between adjacent atoms involve some sharing of electrons, no matter how big the difference in electronegativity. Sure, you wouldn't expect much sharing in KF, but there's a little sharing of electrons anyway. There's certainly no big cutoff that happens at a difference of 1.7 Pauling Electronegativity units.
7 0
2 years ago
The universal genetic language of dna is common to virtually all organisms on earth. True or False
Blizzard [7]

Answer:

True

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All living organisms have DNA which stored  their genetic information.This genetic material may show  a minute variation, but  very similar in compositions. Therefore all organisms share common ancestry.

8 0
3 years ago
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