Which animals has a heart in which oxygenated and deoxygenated blood mix?

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.

What is the name of the type of cell division that occurs in the prokaryotic cell cycle