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Arrange the following events in animal evolution from earliest to latest; earliest coming first (number 1).mesodermfeatherskeratin-covered skinmuscular limbsbone an...

Question

Arrange the following events in animal evolution from earliest to latest; earliest coming first (number 1).mesodermfeatherskeratin-covered skinmuscular limbsbone and other calcified tissuesnotochorddeuterostomyjawslungsmuscle tissue

Arrange the following events in animal evolution from earliest to latest; earliest coming first (number 1). mesoderm feathers keratin-covered skin muscular limbs bone and other calcified tissues notochord deuterostomy jaws lungs muscle tissue



Answers

Place the following evolutionary events in the correct order from earliest to most recent by numbering them from 1 to 5 . ____a. Cambrian explosion ____b. origin of life on Earth ____c. plants' transition to land ____d. oxygen-rich environment created by bacteria e. evolution of birds from dinosaurs

So if you think about these events from the most ancient, the most recent, so let's go through them. The most ancient would be the origin of animals. The next most ancient would be the Cambrian explosion of diversity. Then the first jawed vertebrates of all. Then tetrapods moved on the land, followed by the extinction of the dinosaurs. And then the most recent event would be that Homo erectus leaves Africa. So there are the events in order from the most ancient to the most recent origin of animals. Cambrian explosion of diversity. First job. Vertebrates evolved, Tetrapods moved on the land. The dinosaurs went extinct and then Homo erectus left Africa.

Yeah, Hi there. In this question, we have a Siris of events from this chapter in the book. And this chapter in the book is all about the evolution of animals. Eso as we're putting these in order, it would make sense that he first one. So we're putting them in order from oldest to most recent. So it makes sense that the very first one is going to be letter B. We have the origin with animals. This led the way for the rest of the topics in this chapter. Um, after that, next would be let her a the Cambrian explosion of diversity. Um, most animal lines. Most animal lineages came from this where many different animal lines developed over a very brief short of time. And this was about 542 to 488 million years ago. So this is when we saw most animal lineages developed at Cambrian explosion of diversity moving in order. The next thing here of our options would be a letter f. We have the first vertebrae is with jaws. First jawed vertebrate is have a vertebrae with jaws. This would be a couple of different lines of fish. The carpenter just fish and the bony fish. Um, those were the first ones to have some jaws there. Okay, Alright. Next in order, we have letters. C. This is where the tetrapods start to move onto land. So tetrapod, of course, means four legged animals. They move onto land. Andi, they are indicated to have come from the lobe fin fish. All right, Next, in order here we have the extinction of the dinosaurs. Okay, This occurred during a mass extinction event who is thought to have occurred about 65 million years ago. Right? So dinosaurs went extinct. And then our final thing here is letter e Homo erectus leaves Africa fossil record shows. Oh, that. This occurred that the Homo erectus left Africa about 1.8 million years ago. All right, And those air these six events in chronological order from oldest to most recent. Yeah. Okay, so if you're just looking at letter matching, that would be your answer. Thank you for watching

Okay, So for this problem, we're going to order some events that of, um, the theorized to occur. We're going to order them in chronological order, meaning from earliest to most recent. And, of course, this is in regards to evolution. So what would the first event to be? We have a few different options, but where did things all start? Well, one option is the big bang. And this has to be the first, because this is the conception of the universe. Nothing else that's listed could possibly predate this event, so it has to be the big bank. Okay, so that should be Ah, easy choice for the first event. Remember, we're going from beginning to most recent. So what other options do we have? You have the order origin of proto cells, which is inter option C. And this has to be next, because these were some of the first life forms ever created. These are defined as being organisms that essentially they just have a membrane with stuff in it. There is no, um, clear organization off a cell that we would typically understand today, but it's just membrane bound. Thanks. Okay, So that's crucial. And now from here, things get a little Ah, little trickier, but never fear. Things will all come together and make perfect sense. So we have a few different options. We can look at structures being formed or, um, certain processes specifically photosynthesis. And there's two different kinds of photosynthesis now. Common sense. Would it tell you that, um, photosynthesis depends on certain organelles, So it makes sense for one type of organ el to form first. But this is not the case. Actually, what happens next is going to be the emergence of ah, cyclic pathway of photosynthesis. So sick, quick photosynthesis. And how do we know this? Because there was a lack of oxygen at this time our oxygen in the atmosphere because you should generally be aware that from the photos of this is that we're familiar with that we study Oxygen is important by product. Humans. We breathe it in. That's why it's good tohave um these photosynthetic organisms, it is great for the environment. This one did not produce oxygen. It was predicted that this waas this photosynthesis occurred due to heat and light. So what comes next? What comes next is the photosynthesis that we're most familiar with, which is the nonsense click pathway that produces oxygen. So I'll just right non see photo us. And this produces oxygen, which is very important for other life forms that we're familiar with to thrive. Right, So the non cyclic comes after the cyclic, so we're left with a few more things to occur. We have two more organelles. We have the origin of the mitochondria. Then we have the origin of the chloroplasts. Now, you think that again that the coral Plus would have informed first but with cyclic photosynthesis specifically, um, there were different pigments that would be responsible for capturing the heat and then for non cyclic photosynthesis. There were pigments that captured, um light and produce. Oxygen is a by product. So it turns out, actually, that formation of mitochondria comes next, which is interruption. Be so this would be the next answer option origin of mitochondria. This is essential for, um, respiration. It's how, um why have you, um, you carry outs produce ADP, which we know is vital to do any cellular work or any processes in general. It's the origin of the mitochondria. And last but not least, we have the origin of the chloroplast, which is the organism that plants use for photosynthesis. Very commonly. Chloroplast. Okay. And we're we're told that, um it's been theorized the mitochondria, mitochondria, um, originated due to aerobic bacterium entering and surviving. Ah, host cell. And it makes sense that there would be aerobic bacteria at this point because what just happened or previously that we identified non cyclic photosynthesis that produces oxygen. This could allow the survival of or yeah, the survival and thriving off these aerobic bacteria. And were your thoughts to believe that this bacteria might have been the original mitochondria. So that's how we would organized these events in this way.

This will be a quick overview of so first event is the big back. This created the universe as we know including stars like the sun planets. Following this, we had a virgin of produce owes on Earth. Proto cells were early enclosed member rates. Next we had oxygen producing photosynthesis by saying no back to for you. This created the oxygen rich atmosphere. What services? Calling this the origin of mitochondria. Mitochondria originated as the end of symbiote, meaning they were engulfed by another cell and then evolved to become working outs. Chloroplasts evolved after I know country A a photosynthetic bacterium. Such is the one that reduced the oxygen rich atmosphere were engulfed similar to the way the mitochondria waas. And finally these two helped modern. You carry oats two evolved or the first you periods.


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