Answer:
In some ways, monotremes are very primitive for mammals because, like reptiles and birds, they lay eggs rather than having live birth. In a number of other respects, monotremes are rather derived, having highly modified snouts or beaks, and modern adult monotremes have no teeth.
I believe they use enzymes
I believe it is K or rather potassium
<span>Genetic variation will increase because of a new habitat and food source.</span>
