Draw a conclusion as to why the modern horse has a longer foot than its ancestors.

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

How are proteins and nucleic acids related? they both provide energy. they both carry genetic information. the structure of proteins is determined by nucleic acids. the subunits of nucleic acids are also the subunits of proteins.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?