Answer:
IT is to protect the cells from harm like a barrier
Explanation:
The answer is D. Precambrian.
an organism deriving its nutritional requirements from complex organic substances.
Answer:
14. heterotrophs include both omnivores and carnivores
15. a food chain follows one path of energy and materials between species. A food web is a complex of food chains. a food web is where organisms are placed into different trophic levels.
16. decomposers are heterotrophic, and carnivores are also heterotrophic
17. autotrophs and heterotrophs are both in the food chain.
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