Answer:
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!
The three stages of volcanic activity are active, dormant, and extinct.
I found carbohydrates<span>Larger, more "complex carbohydrates" are made by stringing together chains of glucose subunits into di-saccharides, trisaccharides, polysaccharides. Starch is a complex carbohydrate which plants create for energy storage, and is the most common carbohydrate in the human diet.</span>
One way of creating a variation in a population is through genetic replication errors. This will make new type of alleles. Environmental factors causes variation such as affecting enzyme activity and function. The changes would show in the phenotype of an organism.
I think because humans have sweat glands in their skin that help cool the body by evaporation. Dogs don't have sweat glands but they have extensive blood vessels in their tongues that allow for heat to transfer. Panting helps move air across the tongue which carries away heat from the dog's blood.