Charles Darwin 4 basic Principles | Charles Darwin's Theory of Evolution by natural selection

Charles Darwin 4 basic Principles

1. Who was Charles Darwin?

He was an English naturalist and geologist borned in 1809 and died in 1882.

He started to study medicine but gave up. Later, he studied science, religious philosophic and literary.

After studying divinity, he became a pastor in a small church.

Charles is known as the “father” of evolution theory, as he was the first person to write down a coherent and widely theory about it.

2. What did he do?

- Theory of evolution

Darwinism is the name given to the theory, made up by Charles and Alfred Russell Wallace in the mid -19 century.

This idea was ocurred to Darwin after he read a book of Malthus, where the author said that if the population grow faster than eating resources, finally humans won’t be able to survive.

Darwin applied this theory to all species in general: if the number of individuals of the species grow faster than the food that species consume, foodstuff will run out and individuals won’t have anything to eat, then they will die. Following this reasoning, individuals with less resources or the worst adapted will die first so only the best adapted will survive. Then, the gens of the best adapted individuals will be passed to the next generation in a bigger proportion than the worst adapted just because the number of individuals of the best adapted is much bigger than the worst adapted. This process will be repeated each time the number of individuals grow over the food.

MAIN PRINCIPLES OF DARWINISM

1. Variation exists within populations: the organisms of any population of living things have physical and physical differences.

2. Many organisms die, as in a population more individuals are produced each generations that can survive or reproduce.

3.Over population leads to competition: STRUGGLE FOR EXISTENCE. There is competition between the individuals for space and food, many organisms born but don’t survive.

4. Survivors may pass down favorable traits, the ones who are badly adapted won’t survive: SURVIVAL OF THE FITTEST.

5. The favourable variations of the surviving individuals are transmitted to the offspring.

Natural selection is one of the basic mechanisms of evolution, the concept in which Darwin’s theory is based. Is the gradual process by which biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment.

Darwin’s grand idea of evolution by natural selection is relatively simple but often misunderstood. To find out how it works, imagine a population of beetles:

1.There is variation in traits.

For example, some beetles are green and some are brown.

2.There is differential reproduction.

Since the environment can’t support unlimited population growth, not all individuals get to reproduce to their full potential. In this example, green beetles tend to get eaten by birds and survive to reproduce less often than brown beetles do.




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ImageJohn Constable, (1776-1837). English painter, ranked with Turner as one of the greatest British landscape artists
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FAQ

Chantal
Charles Darwin?

During Darwin's 5 year voyage what were his main conclusions with indications of what he saw and what led him to conclude, using the following terms: homologous, vestigial, analogous, island biogeography, artificial and natural selection.
I need a GOOD darwin site or book (that i can find at the library)

Charles Robert Darwin (12 February 1809 – 19 April 1882) is famed as the eminent English naturalist[I] who presented a mass of evidence which persuaded the scientific community that species develop over time from a common origin. His theories explaining this phenomenon through natural and sexual selection are central to the modern understanding of evolution as the unifying theory of the life sciences, essential in biology and important in other disciplines such as anthropology, psychology and philosophy.[1]

Darwin developed his interest in natural history while studying…

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