Answer:
One difference between the Rhesus system and the ABO group system is that Rh negative people don't usually possess antibodies against RhD (unless they have been previously exposed to it), whereas in the ABO group system if the antigen is absent from the red blood cells.
Here is the link to read more :)
https://www.mydr.com.au/tests-investigations/blood-typing
Some of the reasons for using a zone defense are: The opposing team has a player/players too quick (in the case of guards) or too big (in the case of forwards or centers) for a man-to-man defense to be effective. Many zones pack defenders in the lane but allow the offensive team to take long-range shots
The answer is Blood Chemistries.