Plz hurry on timed quiz Which event occurs in photsystem 1?

Water molecules are broken alart.
Light energy excites electrons.
Oxygen is released as waste.
Electrons are transferred to ferredoxin

Why does bubbling occur when vinegar mixed with baking soda

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.