Why is a blood transport system to carry oxygen to all the cells important in multi-cellular organisms?

How do symptoms created by inflammation the doctor

Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the trait of color blindness. the only unknown is the mother in the first generation

What makes the results of a scientific experiment accurate? a) having multiple trials b) lacking any supporting data c) working in a lab d) using a hypothesis that is always true