The four stages of cellular respiration do not function independently. instead, they function

The correct answer will be- in coupled and coordinated manner.

Explanation:

Cellular respiration is a complex process which involves the breakdown of the sugar molecule to provide energy in the form of ATP.  The process takes place in the four stages: Glycolysis, Krebs cycle,  link reaction, Krebs cycle and the electron transport chain.

These stages are interlinked to each other as the product and intermediates of one set of reaction act as a substrate to another set of reactions like the pyruvate of glycolysis acts as a substrate in the link reaction. Also, the NADH formed in glycolysis and Krebs cycle is used in the electron transport chain.

Thus, in a coupled and coordinated manner is the correct answer.

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation