00:01
So let's learn just a little bit about what stromatolites are for this problem.
00:17
Stramatolites are layers of cyno bacteria, or we also can call it blue -green algae, that are found on, say, rocks, layer, and layers.
00:53
And so they are photosynthesizers, and believe to help.
01:03
Early on to produce oxygen in some type of water environment like the ocean, but they're also found can be found in freshwater.
01:28
So let's look to see the characteristic that matches up with fossilized dermatolites here.
01:37
So our first choice talks about them being formed around say deep sea vents.
01:50
And if if we look at our characteristic here, they are photosynthesizers.
01:58
So we know this one's not correct because there is very little, if not to any light, that are down in the deep sea vents.
02:08
So they did not form around the deep sea vets.
02:17
One of the other choices, if we look at our characteristics, when we're talking about synobacteria here.
02:24
We're talking about prokaryotic organism.
02:34
And so for our choice d, it's basically first fossil of a eukaryot...