Yes, there is growing evidence that cognitive impairment is associated with cigarette smoking.
Answer:
Different numbers of neutrons
B - energy flow from one tropic level to the next
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: definetly A, food webs
Explanation:
the other options are not even related to organisms
