The main difference between mammalian and reptilian teeth is that reptiles are usually homodont while mammals are typically heterodont. This means that all reptiles’ teeth are the same shape and on the other hand, mammals have different types of teeth, like incisors, canines, premolars, and molars. The advantage of mammalian teeth is in those difference in size and shape of teeth which results in their different function. Thus, mammalians are more efficient and specialized for different types of feeding.
Answer:
The femur contains yellow marrow, but the sternum does not. The femur makes red blood cells, and the sternum makes white blood cells. The femur contains compact bone, and the sternum does not.
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C because fish take many more years to fossilize due to being contained/living in water their bodies are harder to break down
The answer to your question is A
An amino group, a carboxyl group, and an R group