Natural Selection

Natural selection is the preferential survival of individuals with useful traits. On the other hand, when some individuals survive, others don't, either because they are out competed for resources or because they are simply killed. This is extinction!

Natural selection is most closely related to Darwin's theory of evolution.

Are those individuals best adapted to their immediate environment.

How does natural selection affect undesirable traits?

d. the accumalation of minor adaptive traits, over time, leads to new species

they are adapted to survive

They are the ones that are best adapted to survive in there environment.

It has not reached carrying Capacity

If there is a genetic mutation in an individual strong enough to modify there chance of survival it opens the door for natural selection. If the effect is positive they are more likely to outlive their original species. If it is negative it decreases their chance of outliving their original species. Also known as survival of the fittest it favors positive trays by "eliminating" negative ones.

ADAPTATION- It is the change in the physical appearance and/or the physiological characteristics of an organism upon exposure to different conditions of environment generally the harsher ones ( such as temperature, radiations and the nutrient sources ) . Gradually the immune system of an organism gets acquainted to the new environment and hence it is said to be adapted.

VARIATION- The transmittance of the adaptation to off springs results in new family of a species known as variants . The phenomenon of the generation of a new variant of a species is known as variation .

ADAPTATION is the source of VARIATION.
For examples if you look at the various breeds of canines ( dogs) in the world, they vary though they belong to the same species , this is because of their adaptation to the different prevailing climatic conditions.

The transfer of adapted features such as longer furs (canines in cold climates) and the modified hooked beaks in birds is due to the transfer of adapted traits from the parents to off springs through the vehicles of heredity known as DNA .

The passing on of the adapted traits to the off springs i.e. variation over an observed period is called as the EVOLUTION of a new variety or EVOLUTION .

Lamarck's idea of how evolution works was through inheritance of acquired characteristics which stated that offspring get the modifications acquired by parents. Further, he believed in "use and disuse", which stated that using a part of the body will make it bigger and stronger, while disuse will make it smaller (such as appendix). Of course, these ideas were strongly rejected in favor of natural selection.

Bacteria is the answer

Yes it does. Without variance in the organisms genome, that gives variance to the phenotype, there would be nothing for natural selection to select from.

organism best adapted to their environment survive- apex

natural selection occurs when animals need it

Vestigial structures are the expressed genetic remnants indicatory of a species evolutionary past. In humans one such vestigial remnant is the coccyx, which were once part of tail structures in our primate ancestors.

No. Natural selection is the non-random survival of randomly varying replicators. The random variation part could be thought of as mutation and recombination that the non-randompart, natural selection, works with.

A book called The Origin of the Species explained the process of natural selection by way of survival of the fittest. The survivors are those that are more able to win over their weaker peers and survive, procreate and continue to live and prosper.

Survival of the fittest

If all individuals in a species are not exactly clones of each other but have small variations in the genes (traits), some will do better when the environment changes. These traits will be "favored" over other traits. More individuals will be found with the trait.

A random mutation is introduced into the genome, whether by genetic mistake or otherwise. If it makes any difference to the behavior of the bacterium is unlikely, but if it is beneficial it will have an advantage over competitors. Which makes it more likely for it to reproduce and more likely to pass on the beneficial mutation. This process repeats and success! The bacterium has evolved.

because some of them who have diseases will die and the others who dont have them wont die.

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Pufflelover <3 <3

A: wEIRDO!! i got this question of random question and yehh!

Means in nature the stronger species survive.