00:02
All right.
00:03
So in order to answer this question, we need to know what a cladogram is.
00:08
And a cladogram is basically just a way of visualizing the progression of evolution as it goes through different species and different groups, where it shows you where each one branches off from the common ancestor.
00:26
So for this one, it kind of gives it to us in, or it gives us kind of the qualities.
00:33
Of each of these groups of plants and it gives us the hint to uh draw a table showing which characteristics are present in each group okay so the way that i would do this is i would put our most general thing first in that they are all going to be plants right so that would be moses i don't know why i wrote masses that's supposed to be an o uh horse tails spurns jimdo spurns and angiosperms.
01:13
Those are five things that we're talking about.
01:15
They're all going to be plants.
01:17
So we'll call horsetails ht, just as an abbreviation, ferns, gymnosperms can be gs, and angiosperms can be as.
01:34
Okay, the next thing that it tells us to kind of classify them is it tells us which one of them are vascular plants.
01:42
Okay.
01:43
Mosses, it says, have no vascular tissue, but it says the rest of these are vascular.
01:48
So we would say horse tails are vascular, ferns are vascular, gymnosperns are vascular, and angiosperms are vascular.
02:05
Next, it tells us that seeds are absent and all but the gynosperms and angiosperms.
02:11
So basically, the only plants that have seeds are gynosperms and angiosperms.
02:21
All right, and then the last, it tells us that angiosperms are the only seeding plants that have flowers.
02:37
All right, so we've kind of narrowed it down as we go.
02:42
And the way we're going to draw this in terms of our cladogram is to start from a point that includes all of the plants.
02:53
So let me kind of shrink this stuff a little bit.
02:59
Sorry about my dog in the background.
03:02
He's mad that i'm not playing with him.
03:06
Let's shrink this and kind of get it out of the way over here.
03:08
We've got some more room to write our platogram...