The Barbarian
Crabby Old White Guy
- Apr 3, 2003
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Barbarian observes:
We have observed a lot of favorable mutations, so reality wins out over that opinion. Would you like to see some examples?
There are no "specious adaptations." They are either adaptive or they aren't. However, you should be careful not to confuse adaptations that involve a new mutation, with those that do not.
Let's begin with bacteria, which over a period of time, evolved new enzyme systems.
Bacteria incidentally exposed to these insecticides have evolved mechanisms to degrade them so that they can use them as sources of nutrients to increase their rates of reproduction and proliferation. Within a few decades, entirely new catabolic pathways dedicated to insecticide mineralization have emerged. For example, at least three distinct metabolic routes have developed specifically for the catabolism of the insecticidal carbamate carbofuran (e.g. Behki and Topp 1993; Chaudhry et al. 2002; Yan et al. 2007). Many bacterial enzymes and pathways have been extensively characterized at the molecular level (Ellis et al. 2001; Scott et al. 2008; Gao et al. 2010), although it is very likely that we are just beginning to understand the extent of this catabolic diversity.
The evolution of new enzyme function: lessons from xenobiotic metabolizing bacteria versus insecticide-resistant insects
The insecticides did not exist prior to their development, so we know these bacteria evolved the new systems to take advantage of them.
All mutations change genomes. That's what the word means. I thought you knew.
We have observed a lot of favorable mutations, so reality wins out over that opinion. Would you like to see some examples?
Are you going to provide specious adaptation as your examples?
There are no "specious adaptations." They are either adaptive or they aren't. However, you should be careful not to confuse adaptations that involve a new mutation, with those that do not.
Let's begin with bacteria, which over a period of time, evolved new enzyme systems.
Bacteria incidentally exposed to these insecticides have evolved mechanisms to degrade them so that they can use them as sources of nutrients to increase their rates of reproduction and proliferation. Within a few decades, entirely new catabolic pathways dedicated to insecticide mineralization have emerged. For example, at least three distinct metabolic routes have developed specifically for the catabolism of the insecticidal carbamate carbofuran (e.g. Behki and Topp 1993; Chaudhry et al. 2002; Yan et al. 2007). Many bacterial enzymes and pathways have been extensively characterized at the molecular level (Ellis et al. 2001; Scott et al. 2008; Gao et al. 2010), although it is very likely that we are just beginning to understand the extent of this catabolic diversity.
The evolution of new enzyme function: lessons from xenobiotic metabolizing bacteria versus insecticide-resistant insects
The insecticides did not exist prior to their development, so we know these bacteria evolved the new systems to take advantage of them.
Not exactly mutatations necessary for the transformation from one genome to another.
All mutations change genomes. That's what the word means. I thought you knew.
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