A- valve replacement
b- stents
x- heart transplant
Answer:
A
Explanation:
zygote is the merged gametes of different organisms
Distillation is a method for separating the components of a mixture based on boiling point differences
In the soil, some ______ convert nitrogen to a form that can be used by plants.
prokaryotes
Note: Question lack information. I have added full question with answer and explanation in info-graph.
Answer:
The cycle of human heart start with end of one beat to beginning of next beat is called cardiac cycle.