Explain how the concept of the “survival of the fittest” relates to the theory of evolution.
Darwin’s theory of evolution includes the concept that species change over time and that these changes occur gradually. Organisms that are not able to compete for resources effectively do not survive. The organisms that remain are able to pass on their more desirable traits to their offspring, which enables the species to evolve over time.
Darwin thought the birds he collected from the Galapagos were different types of birds, but he learned that they were different types of finches that each came from a different island in the Galapagos. What was the significance of that discovery?
The different types of islands had varying conditions. The finches had adapted to their environment, which is why Darwin believed that they were different types of birds rather than different types of finches.
How does competition for resources lead to adaptations?
Organisms that are best suited for survival in their environment will be able to compete for limited resources better than organisms that are not well suited to their environment. The organisms that are able to get the resources they need are more likely to survive and pass their beneficial traits on to their offspring, which is what leads to species adaptation.
Use the concept of natural selection to explain why organisms typically adapt over time.
Natural selection is the process by which organisms which are not as well adapted to their environment do not survive long enough to pass their less favorable traits on to the next generation of their species. Eventually, the more favorable traits are incorporated into a species as the organisms that had those traits survive while the ones who do not die. This process takes time because it occurs through individuals with the favorable traits passing those traits on to future generations. Typically, the less favorable traits will not be eradicated in one generation.
What are the five categories of adaptations?
structural, physiological, behavioral, biochemical, and ecological
What is the purpose of hibernation?
Hibernation is an adaptation that allows animals to survive cold temperatures when food is scarce. Hibernating animals slow their metabolism so that they use less energy, which enables them to live off fat storage until the air is warmer.
What led Darwin to believe that organisms originate from a common ancestor?
The similarities between different types of an organism can be explained by the theory that they all come from a common ancestor. The differences between them are due to changes over time that have developed through natural selection.
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