Electrons become excited in the during the first stage of photosynthesis

The given blank can be filled with chlorophyll.

Explanation:

The reactions of photosynthesis take place in the thylakoid membranes where chlorophyll is present. In the process, two sets of light absorbing reactions and two sets of electron transport reactions are involved. In stage 1 of photosynthesis, light hits photosystem II (P680) in the chlorophyll resulting in the boosting of the electrons to a higher energy level and passing them further into the electron transport chain.

a. as the temperature increases, the kinetic energy of the gas molecules increases & the molecules move faster & further away from each other.

b. if you decrease the temperature of a fixed amount of gas at constant pressure, the combined gas law reduces to charles's law. in this case, volume will also decrease.

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