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What environmental variable caused the beaks in Galapagos finches to evolve?
Wiki User
∙ 11y ago
Changes in the weather led to changes in the food supply available. Sometimes there would be hard nuts, and the finches with tough beaks would survive. However, if, on that same island, the weather changed and longer beaks would be advantageous, the tough-beaked finches would die out and slender beaks would dominate. This is proven by the extensive research carried out by Peter and Rosemary Grant from 1973 to the present.
Wiki User
∙ 11y ago
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What did Darwin wonder about the different finch he observed in his travels?
Darwin wondered if the finches on the Galapagos Islands were an ancester to the mainland finches. It turns out they were, one finch went to the island and its decsandants spead across the island. Geographic isolation caused the gene pools to become isolated and each population adapted to a particular habitat on the Galapagos Islands. Over time all the populations became genotypically different that they do not interbreed. Mating finches look for the beak shape.
What caused Darwin to develop his concept of evolution based on natural selection?
i dont no It was at the Galapagos Islands where he observed finches andd marine iguanas.
Is chickenpox caused by genetic or environmental factors?
Environmental. It's a virus.
How does plant diversification lead to animal diversification?
The more different types of plants there are to eat the more different types of animals will adapt and speciate to eat them. Look at the adaptive radiation of Darwin's finches. The varieties of plants on the Galapagos caused the finches to adapt to the various ways of making a living from the diversified plants. Any tome a plant diversifies the possibility is that an animal will adapt to take advantage of the new resource by the usual means. Natural selection and the evolution.
What did Charle Darwin compare on the bird and what caused the difference?
He didn't do the study of the Galapagos Finches. The people who studied these birds were biologist Peter Grant and Rosemary Grant. They looked at beak size and shape. The finches are commonly called Darwin's finches, however, they really were not studied by him. They used to finches to study Darwin's Theory of Evolution by Natural Selection. In order for NS to occur there must be variation in a population, variations must be heritable, the species must be reproductively successful, and the survival and reproduction of an individual must be nonrandom. The Grants came up with 4 postulates based on the NS model. 1. Is the finch population variable? 2. Is some off the variation among individuals heritable? 3.Do individuals vary in their reproductive success? 4. Are survival and reproduction nonrandom? The overall conclusion that they made was that: when all four of Darwin's postulates are true in a population, the population will evolve; and that evolution an occur over a short period of time.
What are the Environmental differences within ecosystems are generally caused by?
abiotic factors
What caused Nixon to act on environmental issues?
The environmental protection movement was supported by public.
What is environmental therapy?
Environmental therapy, also known as environmental medicine and formerly called clinical ecology, is the diagnosis and treatment of conditions caused by environmental factors.
What caused President Nixon to act on environmental issue?
The environmental protection movement was supported by public.
What environmental hazards cause conjunctivitis?
Conjunctivitis may be caused by environmental hazards, such as wind, smoke, dust, and allergic reactions caused by pollen, dust, or grass.
Why is it important to not change your variable in an experiment?
If you change more that one variable in an experiment, then when the result occurs, you won't know which variable caused the change.
What are the environmental problems caused by carbon dioxide?
There are a great many environmental problems caused by carbon dioxide. These problems include the extinction of quite a few species of animals.
