Explain why the suspension of isolated chloroplasts became alkaline when illuminated?

Yes, protons are pumped across the membrane, but flow right back again through the ATP synthase.  More important is that illumination is required for carbon fixation.  As photosynthesis runs, the chloroplasts remove CO2 from the water they are suspended in.  In solution, CO2 forms carbonic acid, so removing CO2 will reduce the level of carbonic acid, raising the pH.

Explanation:

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

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i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek