People with HIV are unable to fight off these rare diseases because they have a weakened immune system.
Solution
Cut open an onion.
Use forceps to peel a thin layer of epidermis from the inside.
Lay the layer of epidermis on a microscope slide.
Add a drop of iodine solution to the layer.
Carefully place a coverslip over the layer.
Observe it under a microscope to see onion cells.
<span>C. A greater number of wavelengths pass a given point per second.
hope this helps
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Answer: BY Exercise. Or by morning waly
Explanation:beacuse due to walk our blood flow rapidly and provide more boold to brain and spinal cord. Which helps go keep our nervous system healty
Im totally guessing here but im gonna go with choice b
