Answer:
C. antigen-antibody reactions
Explanation:
human blood group is determined by the presence of antigens on the red blood cells which are specific proteins.
so specific antibodies are used against these antigens to determine the type of blood group after the reaction.
Your answer is B. pressure and cementation.
If you look at a sedimentary rock, you see that there is layers.
Hope this helps and have a nice day!!!
- Moon
The answer to this question is the nucleus
Sarah is using a bleach and water mixture to clean the mold off of her deck. Her mixture contains 20 cups of water and 2 cups of bleach
Explanation: