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What idea is supported by Darwin's observation of local variation among toritoises in the galapagos islands?
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∙ 11y ago
adaptation
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∙ 11y ago
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What are the islands where Charles Darwin observed variation among organisms?
Galapagos Islands are the islands where Charles Darwin observed variation among organisms.
Who observed variation in the characteristics of animals and plants on the different islands of Galapagos?
Charles Darwin
How did Darwin explain why Galapagos species had different adaptions and similar South American species?
Define the term Variation and natural selection how do they work together to help cause evolution
What did Darwin observe?
British Naturalist Charles Darwin visited Galapagos Islands in 1835. During his visit he observed that difference species were in a constant battle of survival with each other, and there was a variation in between tortoise on the sand and those in the water.
What did Darwin observed in the finch populations that supported his idea of natural selection?
Darwin observed that on the island, there were many finches, but each one of them were slightly different.Darwin noticed that beak shapes and sizes differed among the finches. This led him to believe that finches evolved differently in response to different environments.The variation in beak size and body size that showed, at a latter date, that all of these birds he thought were vastly different species (wrens, warblers and such ) were one ancestral finch species adapted to many different niches on the many different Islands of the Galapagos.
What are the islands where Charles Darwin observed variation among organisms?
Galapagos Islands are the islands where Charles Darwin observed variation among organisms.
Who observed variation in the characteristics of animals and plants on the different islands of Galapagos?
Charles Darwin
Island where Darwin observed variation in tortoises?
While Charles Darwin was in Galapagos, he visited the islands of Floreana, Isabela, San Cristóbal, and Santiago only.
What is the observation of a wet spot on a hot highway in the summer caused by?
This is caused by refraction. A variation in air density corresponds to variation in refractive index of the air, locally near the road.
Which aspect of Galapagos finches is the best example of heritable variation?
Body size varies among individuals and large parents tend to have large offspring.
Darwin observed that some finches had larger beaks than other finches in the population on the Galpagos Islands What does this observation illustrate?
Variation
Why was variation the weakest concept in Darwin's theory?
Variation?!?! That was an obvious observation of naturalists that opposed Darwin's concepts totally. Unless you mean the heritability that leads to variation? Explaining that variation was the problem. Creationists of the time explained this by positing god's whimsy in designing his species, but this was shown to be nonsense as natural processes are at work in variation and this can be shown experimentally. The concept of natural selection explained how that natural variation was selected on beneficial traits. What Darwin did not understand is how that variation was passed on to progeny. His explanation was wrong.
How did Darwin explain why Galapagos species had different adaptions and similar South American species?
Define the term Variation and natural selection how do they work together to help cause evolution
How do you reverse an average?
You cannot. The average is the mean of a number of observation, and each individual observation cannot be uncovered. We therefore also often study "Variation" or "Standard Deviation" being the sum of square of each observation and the average. You get the Standard deviation by tracting the square root of the variance. Thsi indicates the "spread" of the values.
What does a coefficient of variation tell you?
It tells you about the size of variation relative to the size of the observation, and it has the advantage that the coefficient of variation is independent of the units of observation. Here is a example to help you see it. If you have a data set with weights, the value of the standard deviation of a set of weights will be different depending on whether they are measured in grams or lbs or micrograms etc. For example if you look at the weights of kids from birth to 18 years, some countries measure in lbs other in kg and some even use stones. The coefficient of variation, however, will be the same in both cases as it does not depend on the unit of measurement. So you can obtain information about the children's weight variation around the world by using the coefficient of variation to look at all the ratios of standard deviations to mean in each country. To compute it we look the ratio of the standard deviation to the mean .
Which features of galapagos finches was important to Darwin in development his theory of natural selection?
Basically, the variation in beak size that indicated the birds radiating out from a common ancestor to finding many niches for food acquisition.
What did the variation in the Galapagos finches seem to be well-suited to?
The variations in the Galapagos finches made them well-suited to different types of food.each finch had its own adaption per island on an island where there were only had berry's they hard short strong beaks on islands where mostly flowers bloomed the beaks were long and narrow so they could eat pollen
