What is common ancestor?

Some articles on common ancestor, ancestor, common:

Maximum Parsimony (phylogenetics) - In Detail
... that character was not present in the last common ancestor of all three, in which case it would be a symplesiomorphy) ... to one another than they are to whales because they share hair, because we believe the last common ancestor of the three had hair ... For a number of reasons, two organisms can possess a trait not present in their last common ancestor If we naively took the presence of this trait as evidence of a relationship, we ...
Sensu - Examples in Practical Taxonomy
... and hibiscus, all descend from a shared ancestor, specifically, that they shared a most recent common ancestor (MRCA) ... That ancestor might have been a single species of plant, or even possibly a single individual plant ... Conversely it also means that the family includes all the descendants of that ancestor ...
Siddiqis In The Horn Of Africa - Common Ancestor
... The Muslim cleric Sheikh Abadir Umar Ar-Rida (Abadir Omar Al-Rida ibn Muhammad ibn Shamsadin Al-Bakri Al-Siddiqi) is traditionally regarded as the common ancestor of the Siddiqi families in the Horn region ... Ar-Rida is the main figure in the Fath Madinat Harar, an unpublished history of the city of Harar in the 13th century ...
Aetosaurs - Classification - Phylogeny
... Parrish found Aetosauria to be a monophyletic group and thus a true clade consisting of a common aetosaur ancestor and all of its descendants ... earliest to diverge after the most recent common ancestor ... As a paraphyletic group, aetosaurines would share a most recent common ancestor that is also the ancestor of other non-aetosaurine aetosaurs, and thus ...
Steve Olson (writer) - Research On Ancestry
... The book claimed that the most recent common ancestor of everyone living on the Earth today must have lived just 2,000 to 3,000 years ago, a number that geneticists thought much too small ... If the size of the population is n, then the time to the most recent common ancestor is a small multiple of the base-2 logarithm of n, even if the levels of migration among the populations are very low ... levels of migration, the authors calculated that the most recent common ancestor could have lived as recently as AD 55 ...

Famous quotes containing the words ancestor and/or common:

    In the core of God’s abysm,—
    Was a weed of self and schism;
    And ever the Daemonic Love
    Is the ancestor of wars,
    And the parent of remorse.
    Ralph Waldo Emerson (1803–1882)

    Truth, like climate, is common property ...
    Elizabeth Stuart Phelps (1844–1911)