Zero; myocardial infarction. The posterior interventricular artery supplies much of the left ventricle, the systemic pump .
In 1969, whittaker proposed moving the prokaryotes from the kingdom plantae to a separate kingdom due to structural and metabolic differences.
Chloroplast and mitochondria. Because both organelles are roughly the same size and shape as bacteria, have their own double layer membrane, and mitochondria have dna, that they were engulfed by early cells and are now organelles.
Stable elements are those which have atleast one isotope with no tendency to "decay", i.e., change into anotherelement.
The overall concept a clad organ aims to prove is evolutionary relationships among each organism.
