In cellular respiration, where do the high-energy electrons that move through the electron transport chain originate? A.
water
B.
NADH and FADH2
C.
NAD+ and FAD
D.
glucose
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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

the electromagnetic energy from the sun arrives in the form of visible and invisible light.