The spiny anteater, robin and frog all lay eggs. The spiny anteater is a monotreme-or a type of mammal that lay eggs. A robin is a bird, and a frog is an amphibian. Both birds and amphibians lay eggs.
The leopard is a mammal, therefore it has live births. So, it is the choice that does not lay eggs.
The Marburg virus wasn't mutating this early on, therefore the Coronavirus is much more deadlier and almost impossible to get a cure for, due to the rapid change in pathogens!
