400x because you have to multiply that 40 by that 10
The correct answer would be D, post industrial.
When a yeast cell undergoes fermentation it produces ethyl alcohol, lactic acid and oxygen gas .
<span>1. D dripstone produced by buildup of minerals precipitated from groundwater.
Water drips down from, for example, the roof of a cave and slowly leaves behind mineral deposits which form a shape similar to an icicle
2. D running water cuts small channels into a slope
Rill erosion is formed by soil removal from small streams of running water. They form based on how the water falls down a slope and tend to migrate to already depressed or softer areas of soil.</span>
