What makes the finches on the Galapagos Islands a good example of adaptive radiation?         The thirteen different species of finches developed after there was a mass extinction on the Galapagos Islands.         All thirteen species of finches came from the mainland. However, over time, the finches specialized to their area on the island, and their beaks evolved to help them survive predators.          The finches were native to the islands. Over time, more finches from different areas came to the islands and crossbred with the other species on the island, creating more species of finches.         There are thirteen different species of finches on the Galapagos Islands. All thirteen species of finches share a common ancestor from the mainland. The different species of finches filled the vacant niches on the island and specialized.

One way to prevent a small population of a plant or animal species from going extinct is to deliberately introduce some individuals from a large population of the same species into the smaller population. In terms of the evolutionary mechanisms discussed in this chapter, what are the potential benefits and drawbacks of transferring individuals from one population to another? Do you think biologists and concerned citizens should take such actions?

Scientists have long believed that the 14 species of finches on the Galapagos Islands evolved from a single species of finch that migrated to the islands one to five million years ago. Recent DNA analyses support the conclusion that all of the Galapagos finches evolved from the mainland warbler finch. Different species live on different islands. One of the major changes in the finches is in their beak sizes and shapes. How would an evolutionary biologist today best answer the following question? In the finch population, what are the primary changes that occur gradually over time?   A. The proportions of finches having different traits within a population change.   B. The traits of each finch within a population gradually change.   C. Mutations occur to meet the needs of the finches as the environment changes.   D. Successful behaviors learned by the finches are passed on to offspring.

8) Darwin's finches are often used to illustrate evolution. Evaluate the finch beaks shown in the picture. Choose ALL of the statements that correctly explain the evolution of finch beaks. A) As the environment changed, the finches grew longer beaks to allow them to get food out of fruits. Eliminate   B) Finches with longer beaks settled on the same island with smaller beaked birds. Over time, they bred, producing medium beaked birds that became more common in the population.     C) There are finches with different types of beaks in the population. During a drought, those with shorter beaks are not able to find sufficient food and die, leaving them unable to reproduce and pass the trait on to offspring.     D) A random mutation introduced the shorter, thicker beak into the population. However, those with thinner, longer beaks were better able to get nectar from the island's flowers. Those birds with the shorter, thicker beaks were unable to get enough food to survive.…

ces When Charles Darwin visited the Galapagos Islands, he observed the marine iguana. He later decided that the marine iguana evolved from the terrestrial iguana found on the mainland of South America. The marine iguana differs from the terrestrial iguana in several ways. The marine iguana has a flat tail, long claws and sharp teeth while the terrestrial iguana has a round tail, short claws and flat teeth. The marine iguana became a separate species after being geographically isolated on the Galapagos Islands for several years. What type of speciation is ne ds 1 and 2 Highschool MP3, this?* Adaptive O Allopatric Fri Sympatric O Geographic Next O O

When Charles Darwin visited the Galapagos Islands, he observed the marine iguana. He later decided that the marine iguana evolved from the terrestrial iguana found on the mainland of South America. The marine iguana differs from the terrestrial iguana in several ways. The marine iguana has a flat tail, long claws and sharp teeth while the terrestrial iguana has a round tail, short claws and flat teeth. The marine iguana became a separate species after being geographically isolated on the Galapagos Islands for several years. What type of speciation is this? * Adaptive O Allopatric Sympatric O Geographic

How might an evolutionary biologist explain why a species of birds has evolved a larger beak size? Large beak occurred as a result of mutation in each member of the population. The ancestors of this bird species encountered a tree with larger than average sized seeds. They discovered that by stretching their beaks, the beaks would get longer, and this increase was passed on to their offspring. Over time, the bird beaks became larger. The ancestors of this bird species encountered a tree with larger than average sized seeds. They needed to develop larger beaks in order to eat the larger seed, and over time, they adapted to meet this need. Some members of the ancestral population had larger beaks than others. If larger beak size was advantageous, they would be more likely to survive and reproduce. As such, large beaked birds increased in frequency relative to small beaked birds.

Which of the below best explains why the 14 finch species of the Galapagos Islands are a good example of adaptive radiation? Group of answer choices The 14 finch species originated from 14 different ancestral species that all arrived to the Galapagos over a relatively short time period.   The 14 finch species originated over a relatively short time period from a single species.   The 14 finch species most likely originated as a result of polyploidy.   The 14 finch species on the Galapagos Islands are actually not a good example of adaptive radiation.   The 14 finch species evolved their characteristics separately as a result of convergent evolution.

How might an evolutionary biologist explain why a species of salamander becomes blind after colonizing a cave? Group of answer choices Members of the ancestral population that colonized the cave differed in their ability to see. If maintaining the ability to see in the cave was a waste of energy, blind salamanders might actually have more offspring than those who could see. It is possible that in the cave there is a source of pollution that increases the mutation rate for a gene that makes salamanders blind. Over time, due to exposure to this chemical, the membersof the population lose their sight. There is no way to explain this in terms of natural selection. The members of this salamander species no longer needed to use their eyes. Over time, due to lack of use, they lost the ability to see.

Adaptive radiation is when populations diverge from a common ancestor into new species,  each of which is adapted to its own unique niche. Provide evidence to highlight an example as to how this may have occurred in some of the species of penguins.