A) The data to support his hypothesis, so he should investigate if the same change happens in the density of solid water.
Answer:
your answer is D) A section of DNA that codes for a specific trait
Explanation:
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.
Answer:
it controls the heartbeat and movement of food
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Explanation:
