Which order of events is correct from earliest to most...

Which order of events is correct (from earliest to most recent in time): Question 17 options: Origin of prokaryotic cells -> Origin of land plants -> Endosymbiosis of chloroplasts Origin of prokaryotic cells -> Endosymbiosis of chloroplasts -> Origin of land plants Endosymbiosis of chloroplasts -> Origin of land plants -> Origin of prokaryotic cells

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Transcript

00:01 Which of these is the correct order of the major events of the evolution of life? okay, so we have five options, and we also have five events.

00:13 Mitochondria, protists, multicellular ocarriotes, bacteria, and the colonization of land.

00:18 So can we put these in any kind of order? well, we could start by looking at the colonization of land by vertebrates.

00:24 Vertebrates are multicellular ocarriopes, so this definitely has to come after that.

00:29 In fact, this is most recent.

00:32 So if we put at the bottom five as most recent, because for vertebrates to collise land, vertebrates have to exist, and those are multicellular ocarriotes that use mitochondria to respire aerobically.

00:49 So this requires mitochondria, and it requires multicellularity.

00:56 So that's the most recent.

00:57 That means we can roll out to see.

00:59 Okay.

01:01 What about the earlier stages? what about three? the multicellular ocarriotes.

01:08 Well, this couldn't happen without mitochondria.

01:12 So to get multicellular ocarriotes, we needed aerobic respiration.

01:19 Aerobic respiration.

01:21 Because before that, the unicellular organisms just weren't getting enough atp to support being multicellular.

01:28 So actually, we have the answer...