What is a great example for natural selection?

Answer 1

Natural selection is a process that lets any critter with a more (positive attribute)erability survive better than another similar critter with an (only average) attribute.

For instance:

• Rabbits that can run faster escape foxes more frequently.
• Moths that blend in with bark aren't found and eaten as often.
• Peacocks with bigger and more beautiful tails get to breed with better peahens.
• Lions that can fight off hyenas and other lions better get to eat more.
• Apparently the human hand was shaped by natural selection as our ancestors that survived and bred best could hold a spear or throw a rock best with a hand that looks like ours today

If you want more examples look up galapagos finches and the peppered moth.

Answer 2

the peppered moth.

Until the industrial revelution most peppered moth's were pale coloured with a few exeptional dark moths. The moths like to sit on trees and buildings. Black moths were particularly vunerable to predation by birds because they were more visible.

The industrial revolution covered the country in dark soot. Now the pale coloured moths were more vunerable to predation. There is lots of evidence that the black moths increased massively in number while the pale moths became in a minority.

Since cleanup of buildings over the last 50 years, there is now some evidence that the colours are changing again and black moths are once again reducing in number.

other examples include

MRSA

warfarin resistance in rats

resistance in malaria parasite

nit resistance to shampoos

breeding ages in cod

Answer 3

An example of evolution by natural selection would be:

There is a species of beetle living in a wooded forest full of yellow flowers. Thankfully the beetle is colored to look like the plant and hides extremely well. But a sudden disease kills off the yellow flowers leaving only a species of red flowers behind. As the beetles go on, the ones with darker or redish colorations reproduce more than the lighter or yellowish colored beetles which are less camoflouged. As a result, only the beetles with redish colorations survive and they evolve to become the same red coloration of the new flowers.

Answer 4

One classic but hypothetical example is Daisyworld. In this hypothetical model, we envision a planet inhabited by a single species of life, a single population of daisies. These come in two variants: black daisies and white. The colour is a trait that is passed on genetically to offspring. In the model, that star at which the planet revolves is variant, increasing or decreasing in intensity, changing the amount of light/heat the planet is exposed to. Black daisies will absorb more sunlight, increasing temperatures at the planet surface, while white daisies reflect more sunlight, cooling the planet. Theoretically, increasing temperatures should make things uncomfortable for the black daisies, who heat up faster because of their colour, relative to the white daisies, so that when solar luminosity increases, white daisies gain a reproductive advantage over the black daisies.

A similar example but from real life is the evolution of the peppered moth during and after the industrial revolution. Initially, lighter moths and darker moths were in equilibrium, but as the industrial revolution caused soot to stain the surfaces on which moths frequently settle, and predators could more easily distinguish the lighter moths against the darkening surfaces, darker moths gained a reproductive advantage, as they more often survived predation.

Three more findings are:

Herrel, 2008, Rapid large-scale evolutionary divergence in morphology and performance associated with exploitation of a different dietary resource.

This paper describes how in a few short decades a population of lizards transported to a different environment gained different morphological features by adapting to its new habitat.

Rolshausen, 2009, Contemporary evolution of reproductive isolation and phenotypic divergence in sympatry along a migratory divide.

This paper describes how the interaction between migratory flocks and human settlements is causing a speciation event to occur between flocks that migrate along routes including cities, and those migrating away from cities.

Lenski, 1989, Long-Term Experimental Evolution in Escherichia coli. I. Adaptation and Divergence During 2,000 Generations.

This paper describes morphological changes and associated increased in fitness during the experimental evolution of E. coli populations.

Answer 5

Giraffes whose necks are not long enough to reach a good supply of food will not survive. The giraffes with long necks will survive and breed and their young will tend to have long necks. Over time this causes natural selection of giraffes with the most appropriate length necks.

Answer 6

One great example of natural selection is the peppered moth in England during the Industrial Revolution. When the environment became polluted, the darker moth coloration became more prevalent as it provided better camouflage against polluted surfaces. This is a classic demonstration of how environmental changes can drive evolution through natural selection.

Answer 7

dickriding and licking that good ish