Answer:
All
Explanation:
The electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. It occurs in mitochondria in both cellular respiration and photosynthesis.
•apoptosis-the death of cells which occurs as a normal and controlled part of an organism's growth or DEVELOPMENT.
ANSWER: d. Development
If a star is located 100 light years from earth the light will tack 100 years to reach earth I hope I helped you and good luck
