Answer:
Bacteria release carbon dioxide into the atmosphere when they break down dead plants.
Answer:
secrete a cytokine that triggers apoptosis
Explanation:
Cytotoxic T cells secrete granzymes and perforins when targeting cells. Additionally they secrete cytokines such as IFN-, TNF-α and TNF-β that act to activate macrophages and help kill infected cells.
Autotroph..make their own energy. ..heterotroph get energy from other organisms
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