Ralph has normal blood clotting but has two brothers and a sister with hemophilia what are the most probable genotypes of ralph parents

What correctly describes the relationship between the earth and the sun

Which example best describes a reflex action? a. eating food when hungry b. coughing when the throat is irritated c. bending down to lift a heavy object d. going for a walk outside

What is the name of the idea that energy cannot be created nor destroyed