An opening between the right and left atria that's present in fetal mammals is the a. ductus arteriosus. b. foramen ovale. c. umbilical fistula. d. portosystemic shunt.

What is the next step in the process after a substrate enters the active site of an enzyme

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast

Which contributions did galileo make to the model of the solar system? check all that apply. a mathematical model for the orbits of the planets scientifically accurate data on planetary orbits data that showed that planets reflected sunlight similar to earth's moon up the idea that stars are other suns that do not move u observations of the moons of jupiter rotating around the gas giant