Why is water important to photosynthesis?
a. the splitting of water replaces the electron in photosystem ii
b. the splitting of water replaces the electron in the calvin cycle
c. the formation of water donates an electron to the electron transport chain
d. the formation of water donates an electron to nadh

c. The formation of water donates an electron to the electron transport chain

Explanation:

The electron transport chain results in the synthesis of water, being an electron flow through a chain of O2 to H2O-reduced transporters, with electrons being fed by FADH2 and NADH (formerly reduced in the Krebs cycle are now oxidized). Therefore, we can conclude that water is important for photosynthesis because water formation donates an electron to the electron transport chain.

The electron transport chain is a set of reactions that occurs in mitochondrial ridges in animal cells and occurs in chloroplasts in plant cells, and provides energy for another process, oxidative phosphorylation. Electron conveyor chain and oxidative phosphorylation are therefore related, or rather coupled, events. However, each can occur independently and has different components and products.

the awnser is d i think

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.