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jazzman7838 t1_iqucpr2 wrote

Reply to comment by littlegreenrock in Chernobyl black frogs reveal evolution in action by Picture-unrelated

Selection is the pressure. Evolution is the result. You have a bad understanding of the terms and hopefully are not passing this bad understanding to your pupils. Read what people with PhDs in evolutionary biology have to say on the matter.

What’s an example of evolution based on your understanding?

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littlegreenrock t1_iquhtes wrote

incorrect. selection can be a result of it's own. evolution is something much greater than simply changing colours. you're still confusing selection (and variance) with something greater, so much greater that it completely overshadows selection. these frogs are the same frog in a new colour. where as a cat and a tiger are not on the same level of disparity.

if my mums pink roses turn white it's not an evolution of the rose. they are still roses, with a new colour. that's selection, as a pressure, yes; and variance IN POPULATION as a RESULT. there's no evolution.

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jazzman7838 t1_iqvdajr wrote

JFC. You are a science teacher? Where? Do you deny the fact of Darwinian evolution?

It’s not JUST a change in color. You’re acting like the frogs got a sun tan. What is changing over successive generations is the frequency of genes in the population that code for more melanin. The population is changing. The gene frequencies are changing. The offspring are very slightly different than their ancestors, on average. That’s evolution, baby. The author of the study has a PhD in biology.

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littlegreenrock t1_iqve0f4 wrote

you're describing selection and variance. this isn't a new frog species, it's a new colour.

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jazzman7838 t1_iqvf90e wrote

You really should take a hard look at whatever “lesson” you got in college and actually read what evolution means from some current evolutionary biology papers. It doesn’t only refer to speciation. Obviously speciation can happen as a gradual process without a clear start and end date as two populations slowly diverge. That process is called…evolution.

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