00:01
Hello students, our question is having a statement and we have to, you know, find out what is this phenomena is.
00:10
So the statement is, the fossil records indicate that in some cases, reasonably well -defined species, well -defined species is actually appear suddenly and remain unchanged, unchange for a long, time long time before they extinct actually this is they show the punctuated equilibrium how this is showing punctuated equilibrium actually this is a diagram suppose this is a graph here this graph is representing on x x -axis is representing morphological changes and on y it's showing time okay, so there is a species a, you know, species a which is occur and it's, you know, remain in the environment for a long time.
02:38
Okay, from this species in between, there is a generation of another species that is species b.
02:49
This is species b, okay, and first one is species a.
03:01
Species b there is generation of another species in between and that one species is actually wait a second so that species is actually species third okay so when you see this diagram you can see that this diagram is actually punctuated equilibrium diagram and this is punctuated equilibrium and this is occurring by cladogenesis.
03:58
How? because the one species is not, you know, extinct.
04:04
It's only changing in between.
04:07
Some species are of changing...