2 Which of the following is an example of an abiotic factor?
A) Oak tree
Mushroom
C) Dead, broken branch
D Sand particle

I’m guessing D a sand particle

D) sand particle because an abiotic factor is something that isn’t alive like temperature but in this case an oak tree is living and a dead branch was once living for which it’s an biotic factor so your answer is a sand particle which isn’t living nor will ever be living

The correct answer for the blank is ADP ( adenosine diphosphate).

ATP is the energy currency of the cell. It stores energy in its high energy phosphoanhydride bond, which are present between phosphate. During ATP hydrolysis, the high energy bond is broken down and the large amount of stored energy is liberated. Therefore, ATP loses a phosphate and gets converted into ADP and inorganic phosphate.

Thus, ADP is formed when ATP loses a phosphate.