Answer: The virus weakens as time passes.
Explanation: The virus will weaken continuously during transmission, and will reduce its toxicity after several generations of transmission, without causing much harm to the human body.
Answer:
adrenal glands
Explanation:
also known as suprarenal glands
Parenchyma
phloem
<span>xylem</span>
XX Chromosome and Male have XY chromosome.
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