Everything about biology is a random effect. Even a mutation that’s selected for wasn’t planned; it just happened by chance. Like if you’re an aquatic species maybe you’ll end up being a strong swimmer over generations, but the water doesn’t pressure you towards that on its own. You have to coincidentally develop flukes that make you a stronger swimmer before those traits can be selected for.
Sometimes traits that get passed down aren’t beneficial at all because they don’t make an impact on reproduction. Think of an animal that comes in many colors like a house cat or certain fish species. In such cases it’s clear that the color of the animal doesn’t have any bearing on its ability to reproduce, so a variety of colors are passed down for no particular reason.
That is not how your comment reads. It reads like you think every trait exists as an advantage and propagates because it is a benefit. Plenty of traits propagate as side effects, which is how their comment read to me.
Not really, and I think it’s because any unnecessary trait is an extra cost. But you can have your belief or even think we were magiced by an all powerful entity
unnecessary traits might not always lead to extra cost, and even then, the extra cost might not always lead to extinction.
the extinction usually happens when a trait that represents a disadvantage in a sufficiently heavy competition for survival. If the competition is low enough, the trait may survive.
No, that’s what I am saying. They are saying that it’s a random effect.
Everything about biology is a random effect. Even a mutation that’s selected for wasn’t planned; it just happened by chance. Like if you’re an aquatic species maybe you’ll end up being a strong swimmer over generations, but the water doesn’t pressure you towards that on its own. You have to coincidentally develop flukes that make you a stronger swimmer before those traits can be selected for.
Sometimes traits that get passed down aren’t beneficial at all because they don’t make an impact on reproduction. Think of an animal that comes in many colors like a house cat or certain fish species. In such cases it’s clear that the color of the animal doesn’t have any bearing on its ability to reproduce, so a variety of colors are passed down for no particular reason.
That is not how your comment reads. It reads like you think every trait exists as an advantage and propagates because it is a benefit. Plenty of traits propagate as side effects, which is how their comment read to me.
Not really, and I think it’s because any unnecessary trait is an extra cost. But you can have your belief or even think we were magiced by an all powerful entity
unnecessary traits might not always lead to extra cost, and even then, the extra cost might not always lead to extinction.
the extinction usually happens when a trait that represents a disadvantage in a sufficiently heavy competition for survival. If the competition is low enough, the trait may survive.