Light excites the electrons in chlorophyll a molecules of photosystem 1. As these electrons move to another primary electron receptor, electrons from photosystem 2 replace them.
Therefore the answer is FROM PHOTOSYSTEM 2.
From the table, we can see that P and Q represent water. (Option B)
<h3>What does P and Q represent?</h3>
We know that the liquid range of water is 0 - 100 degrees Celsius. Within this temperature range, water exists as a liquid substance.
Looking at the table we can see that the temperatures of P and Q are 50 and 100 degrees Celsius respectively hence both P and Q represent water.
Learn more about temperature:brainly.com/question/11464844?
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Latent heat- when water evaporates it removes heat
RNA polymerase starts transcription and uses one of the DNA strands as a template to make a new RNA molecule
