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patriot [66]
3 years ago
8

Before photosynthesis evolved, ___ was rare in earths atmospherer

Biology
1 answer:
alexdok [17]3 years ago
3 0
I'm pretty sure the answer is oxygen because photosynthesis is the reason we have oxygen
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I. The landforms such as valleys, volcanoes, hill, plateau, etc., in a geographical area or region.

II. The shape of the land.

Explanation:

In Geography, topography can be defined as the shape and structure of the Earth surface. Thus, a topographic map is used to graphically describe this features.

A topographic map can be defined as an accurate and detailed graphical (two-dimensional) description, representation or records of both natural and man-made (artificial) features on the surface of the Earth.

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II. The shape of the land.

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How would I do this
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