All living organisms interact with their environment to obtain the energy necessary for life. different organisms have different methods of achieving this. which is one of the several methods of energy extraction?

Photosynthesis and cellular respiration.

Explanation:

During photosynthesis plants harvest energy from the sun and capture it in glucose.

During cellular respiration consumers use oxygen and glucose inside the mitochondria and undergo a complex chemical process to extract the stored energy in glucose. Indirectly you are eating "sun".

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands