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 was his explanation for the appearance of new but similar species?
What was his explanation for the appearance of new, but similar, species?
New species were created to fill a defined role in their ecosystem. New species were created after episodes of extinction
. New species were unrelated to previous species, no matter how similar.
Which of the following best explains the beak variation among these four species of finch?
Which of the following statements best explains the variation in the beaks of these four species?
Over time, an abundance of seeds for food led to increased differences between the species
. Competition for limited food resources led to selection for different traits. … The birds with larger beaks would be more numerous.
When individuals from a mainland bird population immigrate to various islands, natural selection may result in closely related , but different, island species. 3. Distantly related organisms may be similar if they live in similar environments .
What is the concept that each living species has descended with changes from other species over time?
Darwin defined
evolution
as “descent with modification,” the idea that species change over time, give rise to new species, and share a common ancestor. The mechanism that Darwin proposed for evolution is natural selection.
Which factors influence the evolution of a species?
Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1)
the potential for a species to increase in number
, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the …
Which best explains why the finches on the Galapagos Islands have differences in beak size and shape?
Several species of finch live on the Galapagos Islands. They are very similar in appearance, but have adapted beaks of different sizes and shapes based on
their major food source
. Evolution through natural selection can increase the species diversity of an ecosystem. …
What are three examples of natural selection?
- Deer Mouse.
- Warrior Ants. …
- Peacocks. …
- Galapagos Finches. …
- Pesticide-resistant Insects. …
- Rat Snake. All rat snakes have similar diets, are excellent climbers and kill by constriction. …
- Peppered Moth. Many times a species is forced to make changes as a direct result of human progress. …
- 10 Examples of Natural Selection. « previous. …
Can one species evolve into another?
One species does not “turn into” another
or several other species — not in an instant, anyway. The evolutionary process of speciation is how one population of a species changes over time to the point where that population is distinct and can no longer interbreed with the “parent” population.
What is isolation in evolution?
Environmental change and isolation of groups of organisms play an important role in evolution. … Isolation means
that organisms of the same species are separated
, and happens when there is something between the organisms that they can't cross. Organisms become isolated as a result of environmental change.
What are homologous features?
Homologous structures are
similar physical features in organisms that share a common ancestor
, but the features serve completely different functions. An example of homologous structures are the limbs of humans, cats, whales, and bats.
Why is camouflage considered an adaptation quizlet?
Why is camouflage considered an adaptation? Camouflage is
a heritable trait that can help an organism avoid predation and thereby increases the chances for survival
.
What does the phrase struggle for existence mean 2 Why is camouflage considered an adaptation?
STUDY. Struggle for existence is the way members of all species compete for food, and space to live. What does the phrase struggle for existence mean? Camouflage is considered an adaptation
because it helps the species survive in their environment
.
What best describes survival of the fittest?
Survival of the fittest is a simple way of describing how evolution (the process by which gradual genetic change occurs over time to a group of living things) works. It describes the
mechanism of natural selection
by explaining how the best-adapted individuals are better suited to their environment.
19. How is the process of survival of the fittest related to a population's environment? →In the survival of the fittest,
individuals that are best suited to their environment survive and reproduce most successfully.
What is Lamarck's theory?
Lamarckism,
a theory of evolution based on the principle that physical changes in organisms during their lifetime
—such as greater development of an organ or a part through increased use—could be transmitted to their offspring.
