Answer: Pollution, climate change, habitat loss, or invasive species
Answer:
C. Concentration gradient
<span>Electrons are transferred via Hydrogen atoms bound to NAD (nicotinamide adenine dinucleotide). Essentially, the krebs cycle harvests electrons (Hydrogen atoms) from pyruvates in the inter-membrane space via NADH and these feed into the electron transport chain to power ATP synthase to generate ATP.</span>
A - rostral and cranial are very similar but rostral are for head structures
HOPE I COULD HELP!!! C: