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no_name

Major
This, however, does not change the fact that, in order for any mutant to become dominant, the dominating species must extinct. This is still the foundation of evolution. No livin things can slowly mutate to gain or lose certain physiological features.
Wouldn't that depend on the population dispersion and how easy it is for them to mingle? For example there are some differences between say a bengal tiger and a siberian tiger. They are relatively isolated by each other under pretty different conditions that probably applied different selection pressures across the whole of the populations each, so overtime they can become isolated but different.

Are there certain selection stress that can alter the phenotype of a species without turning it into a different one? And where are those located on the DNA as opposed to genes that more strictly define intra-species compatibility?

Some maybe not extinction necessary but just have subsets of populations that later on become isolated from each other under different conditions, or an event that causes a genetic bottleneck. It's just that humans have become so well adapted and interconnected due to technological advances.
 

vesicles

Colonel
Wouldn't that depend on the population dispersion and how easy it is for them to mingle? For example there are some differences between say a bengal tiger and a siberian tiger. They are relatively isolated by each other under pretty different conditions that probably applied different selection pressures across the whole of the populations each, so overtime they can become isolated but different.

Are there certain selection stress that can alter the phenotype of a species without turning it into a different one? And where are those located on the DNA as opposed to genes that more strictly define intra-species compatibility?

Some maybe not extinction necessary but just have subsets of populations that later on become isolated from each other under different conditions, or an event that causes a genetic bottleneck. It's just that humans have become so well adapted and interconnected due to technological advances.
Your example is simply a unique case of eliminating the dominating species. You can kill them off, or take them away. The goal is to remove the evolutionary pressure. This is why small isolated islands, like Madagascar, have strange animals.

Definition of species is all by human. We define what should be considered as monkey, what should be considered as dog and what should be human. These differences are all artificial. There is no biological differences. Evolution does not discriminate. To nature, the only thing that matters is survive. It could be crocodiles, which have not changed in hundreds of millions of years. It also could be human, which has changed so much from our rodent-like ancestors living with the dinosaurs. We certainly look nothing like the early mammals that lived with the dinosaurs. Yet, we evolved from them. There is absolutely no pressure for or against any direction of evolution. It's all chances.

Intra-species compatibility is a highly complex matter. There is no one thing that determines it. It could be the total # of chromosomes. It could be a unique gene on the certain single chromosome. For instance, horses have 64 chromosomes while donkeys have 62. A male donkey and a female horse give a mule, which has 63 chromosome. Because of the old # of chromosome, mules cannot have offsprings.

Again, your example is just a special case of evolution. In fact, your case is the exact one that Darwin found on Galápagos Islands and allowed him to come up with the theory of natural selection.
 

Miragedriver

Brigadier
In Argentina the last 10 years have been horrible with the government’s introduction of using politically correct language. There is now a beginning of a backlash to that ideology. Is this form of thought control prevalent in other forum member’s nation?

Below reads: Political Correctness is mental slavery

 

Air Force Brat

Brigadier
Staff member
Super Moderator
Registered Member
I passed by the US embassy in Phnom Penh this evening (July 18, 2016) and found the flag was lowered to half mast. What is it for?
Yes Sir, they are lowered for the recent ambush of Police Officers, resulting in numerous deaths, and injuries, this is the first time since early in the last century that local law enforcement officers have found themselves being targeted by de-ranged individuals who have made a living "hating", now their own sorry situations have been given official "victim status by the POTUS, and heads of the DOJ, disgraceful and very divisive.

Law Enforcement officers both white and black have been targeted and killed as "racial activists" continue to foment fear and hatred. The truth is many police officers spend their own time and resources reaching out in community policing type activities, in order to build a "community partnership" with minority communities.

Sadly, the last two shooters were former US service members, and that is beyond disgraceful, it violates the oath where they swear to protect and defend the constitution against enemies both foreign and domestic??
 

ahho

Junior Member
Anyone have any experience with or opinions on the Keltec Sub-2000 2nd Gen?



As a home defense weapon? Or pistol vs carbine vs shotgun as a home defense weapon in general?
only fired a hand gun, AR15 and Tavor once, so I can't really give you a good opinion.

The good thing I read was that it takes Glock-19 magazines, collapsible for storage. The downside is the charging handle (if you consider that as a negative).

In my personal opinion, if you have decent training with a handgun, I would go for a handgun for home defense. If you think handgun is "harder" to use, this would be a great weapon since it has a stock (it helps a lot with shooting) and 9mm handgun recoil is pretty hard on a novice or for people that doesn't shoot that often. I forgot the price of this, but it should be sub 600USD. I recommend you to go on Hickok45 youtube channel as he have shot this weapon and gave his thoughts on it. (you may try other yourube channel as well)
 

solarz

Brigadier
This is a question for all the Chinese posters who have kids at home:

How do you, as an overseas Chinese, encourage your children to be interested in Chinese culture? I'm looking for inspirations.
 

Iron Man

Major
Registered Member
Anyone have any experience with or opinions on the Keltec Sub-2000 2nd Gen?



As a home defense weapon? Or pistol vs carbine vs shotgun as a home defense weapon in general?
I have the first gen version. It's good for the wife or someone who can't comfortably handle a larger rifle, but you do need to make a few mods (both 1st and 2nd gen) to make the weapon more user-friendly.
 
I have the first gen version. It's good for the wife or someone who can't comfortably handle a larger rifle, but you do need to make a few mods (both 1st and 2nd gen) to make the weapon more user-friendly.
Please pardon the barrage of questions and thanks for any info you decide to share.
Which caliber do you have?
How is the reliability and durability?
How often have you shot it?
Largest capacity magazine you've used?
Do the front sight adjustments hold up well?
Have you found the folding action smooth?
What kinds of mods did you make?
If I get one I would switch the rear sight to an open one, for comfort I would pad the bolt handle and butt. Keeping it simple even though it seems a lot of people aren't happy with the trigger pull.
 

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