What explains the distribution of finch species on the Galapagos Islands?
What explains the distribution of finch species on the Galapagos islands? The Finch species has cascaded with modification from a common mainland ancestor. These species have features in common because they were open to similar pressures of natural selection.
What are the 4 types of evolution?
Groups of species undergo various kinds of natural selection and, over time, may engage in several patterns of evolution: convergent evolution, divergent evolution, parallel evolution, and coevolution.
What is the best explanation on why these organisms share a common structure in number and organization of bones?
Notice that the appendages of the organisms in the picture contain an overall common structure but different functions. What is the best explanation on why these organisms share a common structure in number and organization of bones? These organisms all evolved from a common ancestor.
What evidence of evolution do we use to show common ancestry?
Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features). Similarities and differences among biological molecules (e.g., in the DNA sequence of genes) can be used to determine species’ relatedness.
How do bones provide evidence of evolution?
Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today. Paleontologists can determine the age of fossils using methods like radiometric dating and categorize them to determine the evolutionary relationships between organisms.
What are two types of evidence used to support the theory of evolution?
Darwin used multiple lines of evidence to support his theory of evolution by natural selection — fossil evidence, biogeographical evidence, and anatomical evidence.
What are the theories of evolution?
The theory of evolution is based on the idea that all species? are related and gradually change over time. Evolution relies on there being genetic variation? in a population which affects the physical characteristics (phenotype) of an organism.
What is the modern theory of evolution?
Modern evolutionary theory is based on combining the theory of De Vrie’s mutations with Darwin’s theory of natural selection leading to descent with modification. The Neo Darwin or Modern synthesis is dependent on the concept of mutations creating new information.
What concept is not included in the modern theory of evolution?
Biology Final Review
| Question | Answer |
|---|---|
| Which concept is NOT included in the modern theory of evolution | transmission of acquired characteristics |
| Which phrase best defines evolution by natural selection | a process of change in species over time |
| Examples of fossils include preserved | -eggs -footprints -body parts |
Which statement is best supported by the theory of evolution?
Which statement is best supported by the theory of evolution? Populations that have advantageous characteristics will increase in number.
Which is an example of evidence that has led biologists to accept modern evolutionary theory?
In Summary: Evidence for Evolution Fossil evidence shows the changes in lineages over millions of years, such as in hominids and horses. Studying anatomy allows scientists to identify homologous structures across diverse groups of related organisms, such as leg bones.
What is not apart of Darwin’s theory of evolution?
Acquired characteristics are not part of Darwin’s theory of evolution but rather it is Lamarck’s. Acquired traits cannot be passed to an offspring. This is a trait that a species has developed in its life, like changing their body parts and use them for a different function.
Is there an alternative theory to evolution?
By the start of the 20th century, evolution was generally accepted by biologists but natural selection was in eclipse. Many alternative theories were proposed, but biologists were quick to discount theories such as orthogenesis, vitalism and Lamarckism which offered no mechanism for evolution.
What is needed for evolution by natural selection?
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Does evolution work without natural selection?
Natural Selection and the Evolution of Populations Genetic variation by itself will not result in natural selection unless it exerts some impact on organism survival and reproduction. However, any time all of Darwin’s postulates hold simultaneously—as they do in most populations—natural selection will occur.