Shells are considered biotic because they come from living things. Biotic describes something living or use to be living such as plants and animals. So shells are considered biotic because they come from a living organism.
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Hope that helped:)
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Answer:
1 unit
Explanation:
Each tropic level gets 10% of the energy from the last level it consumed.
The nucleus intructs cells to do their activities
C because you are like a mix between your mom and your dad. This is just an example. I knew the answer, I just added that to get 20 words
May occur in oceans is a type of transforms boundary is a region where earthquakes occur
