Which signal are you talking about?
Certain Protiens, amino acids form protiens
I believe the answer you're looking for is cellular respiration.
They produce hydrogen gas when reacted with metals
Answer:
i hope it helps you
Examples; of biotic factors include any animals, plants, trees, grass, bacteria, moss, or molds that you might find in an ecosystem.
Explanation:
In general, biotic factors are the living components of an ecosystem and are sorted into three groups: producers or autotrophs, consumers or heterotrophs, and decomposers or detritivores.
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