Answer:
Most humans cannot see ultraviolet light because it has a smaller wavelength than violet light, putting it outside of the visible spectrum.

Answer:
The cell membrane contains pores to allow nutrients to enter and waste to leave the cell. cell membrane is SELECTIVELY PERMEABLE which means that the cell membrane controls what enters and leaves the cell. cell membrane protects all cells.
Explanation:
sana makatulong! pa mark po brainliest hehe
Answer:
<h2><u><em>
Upon reinfection, the memory cells will immediately differentiate into plasma cells and CTLs without input from APCs or TH cells.</em></u></h2>
Explanation:
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