Answer:
c. the heart
all the rest actually will excrete, the heart is in a closed system so contributes to excretory organs but doesn't actually do it barring an accident
Explanation:
Can u show picture because without picture I don’t understand the problem u trying to explain
Scientists use atomic mass units (amu) to measure atoms
Robinson Annulation reaction is mainly done for the synthesis of six membered rings. This reaction is the combination of two reactions
1). Michael Addition Reaction and
2). Aldole Condensation.
The synthesis of <span>
desoxy-19-nortestosterone by Robinson Annulation is shown below,</span>