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Nastasia [14]
3 years ago
13

Which of the following BEST describes a change in Earth’s atmosphere made by early photosynthetic life?

Chemistry
1 answer:
swat323 years ago
5 0

A

It is referred to as the Great Oxygenation Event. During this time, photosynthetic organisms evolved and begun utilizing sunlight for energy. They captured this energy into chemical energy. These organisms took up carbon dioxide and evolved oxygen  into the atmosphere.

Explanation:

Oxygen levels in the atmosphere rose drastically as those of carbon dioxide and methane dropped. This increase of oxygen in the atmosphere also allowed the formation of an ozone layer that protects genetic material from UV light. This largely enabled organisms to conquer land.

Learn More:

For more on the Great Oxygenation Event check out;

brainly.com/question/11255683

#LearnWithBrainly

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A white crystalline salt conducts electricity when it is melted and when it dissolves in water.
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Answer: Option (a) is the correct answer.

Explanation:

Ionic salts are defined as the salts which tend to contain ionic bonds as there occurs transfer of electrons between its combining atoms.

So, when an ionic salt melts or it is dissolved in water then it will dissociate into its respective ions and as electricity is the flow of electrons or ions. Hence, this salt is then able to conduct electricity.

As covalent compounds are insoluble in water so, they do no dissociate into ions. Hence, they do not conduct electricity.

Similarly, metallic and network solids do not dissociate into ions either when melted or dissolved in water. Therefore, they also do not conduct electricity.

Thus, we can conclude that when a white crystalline salt conducts electricity when it is melted and when it dissolves in water then this bond is of ionic type.

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Xxxx only girls can join gca-vtki-tqh ​
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Consider the chemical equation. 2NBr3 + 3NaOH mc008-1.jpg N2 + 3NaBr + 3HOBr If there are 40 mol of NBr3 and 48 mol of NaOH, wha
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The correct answer o your amazing question is NBr3
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What is the mass of a rectangular cube with dimensions of 3 cm x 2 cm x to 10 cm and a density of 10 g/cm^3
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