00:01
In what order did these characteristics evolve? so we're looking for the oldest characteristic first, and then working our way forwards.
00:09
So a really good way of thinking about this, and this is our evolutionary history.
00:14
You can see that we have primates at the top there, a well -developed brain adapted to living trees later on the ground.
00:21
So this is our evolutionary history.
00:23
A good way of looking at this is to look at our common ancestry with other groups.
00:29
So the oldest one here is the membrane -bound nucleus.
00:34
So we'll have oldest as the membrane -bound nucleus.
00:38
Why that? because that is a trait that is shared by all ocarios.
00:44
So all organisms we share a domain with have a membrane -bound nucleus.
00:50
So the domain, okaria.
00:55
What is the second oldest? the evolution of multicellular, motile, heterotropic organisms.
01:03
So multi -cellular, motile, heterotrophic.
01:08
What organisms are we referring to here? the animals.
01:13
We share these traits with all animals, which is our kingdom.
01:19
So you might see where this is going here.
01:21
The common ancestor of all animals is more recent than the common ancestor of all ocarioes, because ocariots include animals and then some other stuff, fungi, plants, protists...