What Is Natural Selection For Kids?
- Controlling the dark colour of trees
- Evolutionary history of fossil evidence
- The Media Asset of the XYZ Group
- The Bell Curve: A way to describe the characteristics of animals in a natural setting
- Natural selection and the environment
- The Giraffes are Different
- The giraffe population with the longest neck
- The most beneficial traits are the ones that survive environmental change
- Evolutionary evidence
- Natural Selection
Controlling the dark colour of trees
The trees were made to look black by the pollution. The light coloured moths were against the dark bark. The dark coloured moths had an advantage.
The dark colour is controlled by genes. Controls against pollution made the environment cleaner after the second world war. Some insects are harmless, but they mimic other insects which are dangerous or foul.
The better mimics survive better. They live to produce more offspring than the less good mimics. The genes of the better mimics are more common in the species.
Evolutionary history of fossil evidence
The members of the species with the most desirable characteristics are able to produce offspring. If a species is unable to adapt, it is at risk of extinction. Evolution can take many thousands of years to happen. Fossil evidence has been used by scientists to look at how organisms have evolved over millions of years.
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The Bell Curve: A way to describe the characteristics of animals in a natural setting
Natural selection causes organisms to change over time. The environment is constantly changing and animals inherit their genetics from their parents. No organisms are perfectly adapted to their environment.
Natural selection is influencing the evolution of species. The population could be grey after a few generations of pressure. It depends on the genetics of the trait, but in some cases a single trait is selected for and the rest are lost from the population.
The black and white coat colors could become rare. When the predator changes, retaining the traits can be an advantage. If the owls and night predators were gone, it would better to be black.
It is important to consider the different characteristics of the same animals. Imagine a population of mice in the woods. Consider a trait that runs on a continuous scale instead of their color.
Imagine a mouse that is larger than a rat. The mice are different sizes and different species. The advantage of faster cheetahs over other ones is that they can support a larger family.
Natural selection and the environment
Natural selection is the process through which species adapt to their environment in order to survive. Natural selection occurs when parents pass on certain genes to their children. The environment affects natural selection.
The Giraffes are Different
Adrian says that if you measured the giraffes' necks, they're all going to be different. The differences are determined by their genes. The cause of evolution is not solely selection for adaptation.
There are neutral mutations that can cause species change and have no benefit to an individual. Scientists have been able to predict natural selection. It is almost impossible to know the effects of the environment in the future.
The giraffe population with the longest neck
Plants that are very tall are at risk of being blown over because of the exposure to more wind. Plants that are short are unable to get enough sunlight to grow. Plants that are a middle height between the two get both protection from the wind and enough sunlight.
The most beneficial traits are the ones that survive environmental change
The species with the highest genetic variation is the one that will survive an environmental change. The individuals with the most beneficial traits are more likely to live to be older. Environmental changes can cause certain traits to be harmful.
The white bodies of the peppered moths were created to hide from the trees they lived on. White moths were not able to blend in because of pollution. The dark-colored moths were the only ones that survived to reproduce.
There is lots of evidence for evolution. It explains why plants and animals are so good at surviving in their environments. It means that a species can change and even split into two new species.
Some animals are more related to each other than others. The more closely related animals look and act alike. The swans and geese are very similar.
Natural selection is the process by which species adapt to their environment. Natural selection weeds out the traits that make survival more difficult by boosting the biological traits that help animals and plants survive in their environment. Natural selection is the process by which species change.
Natural selection will help a species survive in their environment and pass on favorable genetic changes to their offspring. Only those with favorable adaptations will survive. Natural selection is not perfect.