![]() Proximate and ultimate explanations also differ in the time scale over which they act. ultimate, try to think of it in a different way. If you're still confused about proximate vs. We designed the bike to help us move around faster and use our time more wisely. That is the proximate cause of how a bike works.īut what are the ultimate causes of why the bike moves? One proposal is that humans needed a faster way to get around. We can also look at more familiar problems in terms of proximate or ultimate questions. They were less likely to get eaten by birds and could then reproduce and pass their wing colors on. In polluted forests, moths with dark wings blended in better. In non-polluted forests, moths with light wings were more likely to survive. Understanding both the proximate and ultimate causes helps us to understand why traits change over time. The proximate cause and ultimate cause are often both involved in bringing about a trait that helps an organism survive in its niche.īicycling can be used as another example of proximate vs. So in a specific environment, one wing color may help more moths survive than the other wing color. By blending in, their chances of survival increase. We now know that the wings of the peppered moth help the moths blend in. Why might an animal like the peppered moth have colored wings? Why a trait evolves is known as the ultimate cause. In moths that survive and reproduce, the genes for a specific color is passed to their offspring. A specific gene codes for whether they have light or dark-colored wings. The proximate cause of the wing color in the peppered moth is genetic. Some common questions focus on how a trait develops. Scientists ask these sorts of questions and test them based on previous knowledge and future predictions. How did an individual moth end up with that wing color? And why does this species of moth even have those wing colors? The How and the Why The peppered moth's cryptic wing color is based on several different factors. I keep clicking on it and wondering what went wrong before I remember this little foible.Īs one functional comment, it might be nice to select a server from nearby choices, if one wants to compare (ahem) apples-to-apples over time.Peppered moths are colored to blend in against trees. everything else is a picon and the “start” letter-button happens to be directly under this large graphic that looks for all the world like a big old button. The button is actually the text area over the letters “start”. #Pocket mouse selection quiz how toIf you’re trying to document a tendency towards less-than-advertised speed to harangue your ISP, you’ll need to get a little creative on how to show your test outcomes.įinally, the start icon is not stylistically cohesive with the rest of the interface. The only way to save the result outside the app is once-only option at the end of each test to share that single result. The problem is compounded by a lack of actual Sharing/export. There is a difference in that the arriow points to the side instead of up, but it’s similar enough that you’re bound to quit by mistake a time or two if your’e looking to output your results. The Quit icon looks like the ubiquitous Apple share icon … the box with an arrow pointing out of it. There is no auto-nag built in, but hey, I paid my five bucks, does a third of my functionality really still need to be marketing? Two out of six icons are devoted to the app’s marketing. Even after using the app awhile, I often need to briefly stop a moment to think about the iconnography. The rough spots are with the GUI (planning and execution). ![]()
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