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daser333 [38]
3 years ago
5

Virus important environmental role

Biology
1 answer:
Tems11 [23]3 years ago
4 0
In the world's oceans 90% of the biomass is microbial with viruses turning over 20% of that daily. without the turnover of biomass driven by viruses many sources of food would not be present for other organisms
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The correct answer would be A. crust.

The crust is the outermost layer of the earth which is composed of different types of rocks such as sedimentary, metamorphic, and igneous rocks.

It is completely solid and can be broadly classified into two types: continental crust and oceanic crust.

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The thickness of the continental crust is around 30 km to 50 km.  

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