The red and blue arrows labeled a and b despic movement of gas between the alveolus of the letters represent ?

What effect does plate tectonics have an organic evolution

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

Explain two reasons you think it is important for scientists to search for new ways to treat cancer