Best answer: Yes.
It's not "natural selection" but it's one kind of evolution.
It can even lead to speciations sometimes.

For example, one race is changed to another race by changing the genes. Are there such ability and technology for human beings? It seems that there is something called “genetic engineering”.

I mean that is NOT based on religious/theistic accounts, but an actual scientific hypothesis/theory which has the potential to be falsifiable..

Best answer: I feel like it's an evolutionary thing. Waaay back in the day, humans had to constantly fight and kill predators to survive as well as hunt and kill prey so they could eat. As time went on and we evolved and progressed to the point we're at now, the need to fight and hunt for survival is gone. But I think that primal urge/instinct is still ingrained in us, and might be the reason we do things like boxing and UFC, fist fights, or things like lots of exercise or playing videogames, anything to get that rush of adrenaline or release of anger and stress.

I think people that kill can't find their outlet, and so that urge/instinct hits a tipping point to where they explode and the end result is murder.

If you're looking for more surface reasons:
Anger
Hate
Money (hired or life insurance)
To get out of marriage
To hide an affair
Gang initiation
Drunk (usually with anger)
High (altered state of mind)
A lack of care/concern for others lives
Ego
Power
Government (Army)
Control
Etc, etc.

Best answer: You can't. But if you keep trying and your kids keep trying, your 25,000th generation might be.

Like, isn't that useless, to be scared or find lizards disgusting, if they can't really hurt us? Plus, they eat other insects that could hurt us..so they actually benefit us Don't say "I'm not scared of them"/"I don't find them gross". You *do* know that most others do...so what's the reason, evolutionarily?

How I see it is why would we be dead forever? It’s hard to explain how I think. So think about this: why would we be DEAD FOREVER? I believe life is a cycle although the scientific part of being deceased says you loose your memory, etc I believe that. I believe that when we die we’re born again into another HUMAN not animal not any of that. However, how would this be true if the human population increased over years?

Best answer: Animals that can see in the dark are known as nocturnal animals, and many of these animals are desert dwellers that evolved into nocturnal animals to avoid the extreme heat of the desert in the daytime.For one, they have big eyes. Nocturnal hunters like owls and cats have pupils that, when open wide, cover the entire front of the eye. So do tree frogs, which have to be able to jump from branch to branch. In owls, eye size approaches the extreme: their eyes occupy over half the volume of their skulls.

There are also physiological differences between the eyes of nocturnal and diurnal animals. Owls’ eyes are tubular, rather than spherical, with a very large lens positioned close to the retina. This structure allows a lot of light to register on the retina, but at the expense of flexible focusing. Owls are thought to be somewhat far-sighted. Tubular eyes cannot rotate in their sockets like the spherical eyes you and I have, so owls compensate with incredibly flexible necks that allow them to turn their heads 270 degrees.

Many nocturnal animals have a mirror-like layer, called the tapetum, behind the retina, which helps them make the most of small amounts of light. Light that passes through the retina is reflected off the tapetum, giving the retinal cells a second chance to sense it. This makes some animals’ eyes shine in the glare of car headlights. The color you see is the pigment on the inner layer of the retina.

At the heart of all vision is the retina, which contains two types of light-sensing cells: rods and cones. Cones account for color vision but require bright, focused light, whereas rods can sense very dim, scattered light, but don’t produce a color image

Best answer: African elephant.

Best answer: Since your brain is already active 24/7 (which is why we have dreams in the first place), nothing would happen in your scenario. You said she goes to this alternate dimension IN HER DREAMS, so her body and brain are getting the rest they require to function. If you would like to invent some kind of weird side-effect from her mind being shifted to another dimension however, that's your prerogative as a writer.

Best answer: There is no gene that encodes suicidal behavior, just as there is no gene that encodes drinking alcohol or taking drugs, Suicide is one outcome, out of many of the genes that encode the fight or flight response. When animals are stressed, they respond by trying to flee what stresses them, or if they cannot flee, they will fight. In the case of emotional distress, people feel bad. They are stressed, and yet they can neither fight nor can they flee. For some people, one way to escape their physical or emotional pain is to consume alcohol or drugs. They do get relief temporarily but the pain returns as soon as the effects of alcohol or drugs dissipates. So they have take some more drugs or alcohol to get more relief. The fight or flight response is adaptive as it helps animals to survive. However, the same response may result in an individual deciding that he/she can only be relived of suffering by taking his/her own lives.

People who kill themselves may suffer reduced fitness, especially if they commit suicide before they have children. If their absence makes it less likely that their children will survive to adulthood, then their fitness will also be reduced. However, unless the fight or flight response results in suicidal behavior all of the time, it is still advantageous enough that it will persist. That means unless all of the people kill themselves all of the time when they are distressed, the fight or flight response cannot be eliminated by natural selection. Therefore even though there are no genes that instruct a person to commit suicide, the behavior will continue to persist and may pop up here and there, when an individual decides that he/she is suffering so much that the only way out is to end his/her own life.