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scoray [572]
2 years ago
9

Oxygen was introduced into the atmosphere as a byproduct of a. respiration. c. dehydration. b. photosynthesis. d. osmosis.

Biology
2 answers:
Tanzania [10]2 years ago
4 0
Photosynthesis  asdfsfdnaflkjns
 
natima [27]2 years ago
3 0

Answer: b. photosynthesis.

Explanation:

Photosynthesis is a  chemical reaction that occurs in the cells of the plant leaves. The process requires carbon dioxide from the atmosphere and water as reactants. These reactants get converted into carbohydrates (glucose) and oxygen as byproducts in the presence of sunlight. For the first time on earth the oxygen was produced by the photosynthesizing cyanobacteria. As these organisms used to fix carbon dioxide in water.

Therefore, oxygen was introduced into the atmosphere as a byproduct by the process of photosynthesis.  

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Igneous rocks are formed by hot melted magma coming from the Earth's core that crystalizes when gets in contact with air. They can be either intrusive or extrusive. B) <em>Large mineral crystals.</em>

<h3>What is the igneous rock?</h3>

These rocks come straight from the interior of the Earth.

A liquid mass of silicate composition comes from the Earth's core. This melted mass comes at an extremely high temperature.

Magma begins to cool and solidify during its ascent to the Earth's surface. It solidifies and crystallizes into igneous rock following the magnetic field orientation.

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According to this description, the correct option is B. <em>Large mineral </em><em>crystals</em><em>.</em>

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brainly.com/question/23555197

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Answer:

Explanation

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