During speciation, when do two groups become recognized as separate species? a. when they look different. b. when they are separated by an isolation barrier. c. when they cannot interbreed. d. when they are both herbivores.

b.have there own function.

cellular respiration oxidizes food into energy in the form of atps.

glycolysis (6 c hexose) > 2x atps are used > 6c hexose biphosphate > 2 x 3c triphosphate >

2 x 3c pyruvate (2x nadh produced from nad) and (4x atp produced)

pyruvate actively pumped mitochondrial matrix.