It would be 2) two atoms exchange electrons and become ions
They both transport ions, sugars, and salts across the membrane
Centimeter because it is the only metric measurement
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Monarchs can warm up by basking in the sun. Basking helps a monarch raise its muscle temperatures to flight threshold. When monarchs bask they open their wings and tilt them toward the sun. Like solar panels, monarchs capture the sun's energy by exposing the surface area of their wings directly to the sun.
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