Answer:
Be
Beryllium
Explanation:
number of protons = atomic number.
number of electrons = atomic number
ATP is the main energy-providing molecule in living organisms.
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.
