They use anaerobic cellular respiration to produce NAD+ from NADH.
B is you're answer. I did this before
The have gills instead of lungs, which help them breathe underwater. They are cold-blooded, which means they can adapt to cold weather, such as the water. They have fins which helps them swim easily through the water.
Hope this helps :)
Systematics is based on data while baraminology is based on worldview. According to evolutionary theory, a derived trait can lead to a completely new type of animal. There is no place for genetics in baraminology. Baraminology uses both genetics and physical features to classify organisms.
2n-1, is this the answer your trying to find?