How did the compromise of 1877 mark the beginning of the end of reconstruction?
it removed federal troops from the south.
it placed a democrat in the white house.
it supported jim crow laws in the south.
it created a split within the republican party.

it placed a democrat in the white house

b

Explanation:

just took test brainliest pls

the of atp are the key to its ability to store and supply energy;

phosphate

the phosphate groups of atp are the key to its ability to store and supply energy. atp releases energy when it breaks bonds between its phosphate groups.