Well, so long as each species that ever existed on earth did not belong it its own totally separate lineage, having multiple lineages amongst the species on earth would be entirely consistent with evolution.
Such an occurance means life began many times, and many of those separate incidents of either biogenesis or abiogenesis then went on to spawn its own evolutionary lineage.
In fact, if it were not for hard evident to the contrary, our knowledge of organic chemistry would probably have led us to believe that there ought to be multiple, independent, unrelated evolutionary lineages in life on earth.
However, hard evidence from the proteins of all life on earth shows otherwise. It shows all life on earth most likely are descendants of a single lineage of primitive organisms. (Some have argued two very similar related lineages, but those lineages would have to be so similar they almost certainly have to be related. Mathematically probability of life on earth actually having arisen from two different lineages rather than one have been estimated at 10 to two thousands power, in other words, ) Furthermore this single lineage experienced considerable evolution before it branched off into all different types of life on earth.
By tracing common characteristics of all different type of life on earth, biologists are fairly confident what last organism on the common ancesteral lineage, just before the lineage split into all different forms of life on earth, looks like, how it functions, and how it behaves.
The even have a name for it LUCA - Last Universal Common Ancester. LUCA lived between 3.5 billion and 3.8 billion years ago. It was a single celled organism. It had no cell nucleus. It had a two layered cell membrane with through-membrane ion transport. It relied on chemiosmosis for energy production. It had double stranded DNA. It already had sophisticated system DNA maintenance.
Such an occurance means life began many times, and many of those separate incidents of either biogenesis or abiogenesis then went on to spawn its own evolutionary lineage.
In fact, if it were not for hard evident to the contrary, our knowledge of organic chemistry would probably have led us to believe that there ought to be multiple, independent, unrelated evolutionary lineages in life on earth.
However, hard evidence from the proteins of all life on earth shows otherwise. It shows all life on earth most likely are descendants of a single lineage of primitive organisms. (Some have argued two very similar related lineages, but those lineages would have to be so similar they almost certainly have to be related. Mathematically probability of life on earth actually having arisen from two different lineages rather than one have been estimated at 10 to two thousands power, in other words, ) Furthermore this single lineage experienced considerable evolution before it branched off into all different types of life on earth.
By tracing common characteristics of all different type of life on earth, biologists are fairly confident what last organism on the common ancesteral lineage, just before the lineage split into all different forms of life on earth, looks like, how it functions, and how it behaves.
The even have a name for it LUCA - Last Universal Common Ancester. LUCA lived between 3.5 billion and 3.8 billion years ago. It was a single celled organism. It had no cell nucleus. It had a two layered cell membrane with through-membrane ion transport. It relied on chemiosmosis for energy production. It had double stranded DNA. It already had sophisticated system DNA maintenance.
