Suppose our hypothesis is that "as tigers get older, they have more mass." if another group of scientists claims that this hypothesis is not supported by their data, their data must show that older tigers
a. have less mass
b. have more mass
c. are better hunters
d. are worse hunters

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Cells destroy body cells infected by a virus or bacteria.

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half