Chloroplasts could be found in blue-green algae
Answer:The immune system is a network of cells, tissues and organs that work together to attack pathogens that try to invade your body. Bacteria, parasites and fungi that may cause infection meet a system of immune soldiers, including T-lymphocytes, macrophages and neutrophils.
Explanation:
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The ideal drug will have a high toxic dose and a low effective dose.
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