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Discuss how environmental faclors can affect time to flower in flowering plants....

Question

Discuss how environmental faclors can affect time to flower in flowering plants.

Discuss how environmental faclors can affect time to flower in flowering plants.



Answers

Explain why a plant with a mutation in one of its phytochrome genes that affects flowering time would be at an evolutionary disadvantage.

Okay there. So this question seems a little confusing but it's basically asking us why is it an evolutionary disadvantage? Two have a plant that has a fighter chrome gene mutation. So since this affects flowering time, let's focus on that. Okay, so what is an evolutionary disadvantage? That means that it's going to have the survival or the survival of the fittest? You heard that the rest? Okay, so what is the purpose of flowering this draw flower? It's important with reproduction. Okay. And if they don't have fitted chrome correctly, vita chrome tells you when things are basically so when to flower is what that gene is responsible for. So this is us. This question is hoping that we understand what this is. So as long as we understand what that is, um we should be able to answer this correctly, even if you don't have the exact same uh answer. So what is the over answer is basically because of that plant will flower at the wrong time, which is then going to cause the prevention of success? We we're producing because that's what that flower is responsible for. So without this working correctly, it's going to go, oh no, something's wrong. And then it's going to like flower in the winter or at night when there's no pollinators around and thus will not be able to reproduce. Um I hope you learned something have a great day

To this diagram demonstrates the life cycle of a flowering plants. I'm starting here. We have the seeds. Um, they have a story to see. Coat embryo. When they are Germany, def, they will eventually grow. This is when they grew roots leaves, etcetera. And then they turned into a flowering plant where we have this stigma the pistol, the steam in the ovary, etcetera. They will then be pollinated it, which causes mature seeds and causes the Scicolone.

So for this question, we're supposed to connect flowering and photo period and were supposed to come up with hypothesis to explain wife. It's prompts more adaptive plans to follow toe flower in relation to photo appeared rather than in relation to temperature. Why might be advantageous to flower in response to changes in daylight? That this is changes in temperature? And one possible explanation is that it's more reliable from the plants perspective to respond to photo period. It's a phone of period, uh, you know is predictable. You know, in the spring, the day start getting longer and longer and longer, and that happens every year, year in, year out quite reliably. So ah, photo period is completely predictable. And so if a plant has evolved to respond to the length of days or, more likely, the length of nights, it can sort of reliably flower at the same time every year. And, of course, if it does that, it hopes that France could hope, ah, that it will pick up the same pollinators as it had say the year before. So reliability is probably the explanation right hypothesis that if you were, if you fire response to photo period. It's more predictable your fire at the same time and you'll be visited by the same pollinators. If instead, a planet response to temperature. Then you can see that that's less reliable. So, for example, you could easily imagine that there's a warm spell in the middle of winter that lasts a week. And maybe that is enough to cause a particular plant. Species start to flower. Well, that would be a disaster, because the middle of winter and the pollinators haven't emerged yet. Uh, so temperature is almost certainly less reliable. All right, so reliability is probably greater with photo period, then with temperature.

As the book outlines there really through two parts to how plants detect light. There are final chrome's, which are proteins that can change back and forth between two forms, depending on the amount of light they're exposed to in the color of the light. And so they changed from one form into another form, say, during the course of the day, and then they revert back to that first form over night. And then the second component here is with cold on oscillator, which is a kind of a shorthand, um, for a group of genes that produce proteins that are also involved in, uh, sort of measuring day length and, uh, and setting up circadian rhythms. And so the oscillator is basically jeans that make proteins that are also recognized and sort of time related issues. So there are these two components, and they interact, and the book doesn't provide a lot of detail on how they interact. Um, but they doof and final crimes can help plans measure day length, right, And that can lean to, uh, production of flowers. So lots of plans que their flowering into, say, short days are long nights. Uh oh. Are long nights and short days and so they can produce flowers. And what's happening is the final chrome search are signaling to molecules right that actually then trigger flowering. It's not a direct relationship. Lots of molecules. Lots of signals are involved there, Um, and then there's also the circadian rhythms, and circadian rhythms are just patterns in the daily ah, life of a plant. Um So, for example, plans open their Samana in the morning and closed them in the evening. And so plants have to know when the warning is starting and when the evening is coming on and again, they can use that by they could detect that using pigments, often using fighter chrome's um, But all of these different pieces are are interconnected, um, final chrome's oscillator and then the different patterns that fallout. And although a lot of details are known, some details aren't known in the book does not go into much detail about how that's first, either


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