👤
Answered

Trouvez des réponses fiables à toutes vos questions sur FRstudy.me. Obtenez des réponses détaillées et précises de la part de notre communauté de professionnels bien informés.

Can you help me please ?

Classify each example as most likely caused by natural selection, mutation, migration, or isolation. Write the correct cause in the space provided.

1. A group of finches from the United States were released on the Hawaiian islands. These finches gave rise to 23 new species. Each new species ate a different kind of food found on the Hawaiian islands.

2. During the past 15 years, dark colored peppered moths have replaced light colored peppered moths in the large industrial areas of Great Britain. In these areas air pollution has darkened the bark of the trees. Dark colored peppered moths blended with the color to the tree bark . Light colored peppered moths were quickly spotted and eaten by birds.

3. All of the zebras in a population had stripes that were 20 cm apart. Several zebras from another population, which had stripes only 5 cm apart, moved into this population and bred with its members.

4. Most of the bacteria placed in a growth culture containing an antibiotic were killed. Some of these bacteria, however, did survive. The surviving bacteria were allowed to reproduce Then, they were placed in another growth culture containing the antibiotic. All of these bacteria survived.

5. Scarlet oak trees and black oak trees grow throughout the eastern part of
the United States. These two kinds of oak trees do not cross pollinate. Scarlet oak trees grow in moist valleys. Black oak tress grow in dry uplands.

6 Fossil evidence shows that the first camels developed in North America.
Some of these camels crossed over the land bridge that connected North America to Asia. Others traveled to South America, where they evolved into the animals that look much different than camels.

7. Most houseflies died after being sprayed with an insecticide. Some houseflies survived. The surviving houseflies were not affected by further spraying of the insecticide.

8. There are two populations of squirrels in the Grand Canyon area. Yje Kaibar squirrel, which lives on the north rim of the Grand Canyon has a white tail, dark fur underneath, and long ears. The Abert squirrel, which lives on the south rim of the grand canyon, has a grey tail, light far underneath, and also has long ears. Both squirrels developed from a single species.

9. The first giraffes had long and short necks. These giraffes ate mainly grass. As the climate changed, the grass died out and trees became more abundant. Giraffes with long necks could feed on the leaves of the trees. Giraffes with short necks died out because they could not find enough food.

10. Pitcain Island was settled settled in 1790. One of the original settlers had poor teeth. Today, all people who live on Pitcain island lose their teeth at an early age.

11. An organism that is likely to be chosen as a mate will have more offspring. Fruit flies prefer red eyed mates over white eyed mates. Thus, white eyed individuals rapidly die out in a population of fruit flies.

12. One of the offspring of a pair of grey squirrels was born with white fur. The newly born squirrel with white fur was soon eaten by a hawk.

Sagot :

1. Migration: A group of finches from the United States were released on the Hawaiian islands, giving rise to 23 new species, each adapted to different types of food found on the Hawaiian islands.

2. Natural selection: Dark colored peppered moths replaced light colored ones in industrial areas of Great Britain due to air pollution darkening tree bark, providing better camouflage for dark moths and making light moths more visible to birds.

3. Migration and natural selection: Zebras from another population with stripes 5 cm apart moved into a population with 20 cm apart stripes and bred with its members, leading to a change in stripe frequency due to natural selection.

4. Mutation and natural selection: Some bacteria survived exposure to antibiotics, reproducing and passing on resistance, resulting in a population of resistant bacteria.

5. Isolation: Scarlet oak and black oak trees, which do not cross-pollinate, grow in different environments - scarlet oak in moist valleys and black oak in dry uplands.

6. Migration and isolation: The first camels developed in North America, some migrating to Asia and others to South America, where they evolved differently.

7. Mutation and natural selection: Some houseflies survived insecticide spraying, passing on resistance traits to offspring, resulting in a population of resistant flies.

8. Isolation: Yje Kaibar and Abert squirrels developed from a single species but evolved separately due to their habitats on the north and south rims of the Grand Canyon.

9. Natural selection: Giraffes with long necks survived as trees became more abundant, while giraffes with short necks died out due to inability to access food.

10. Mutation and natural selection: Poor dental health of one original settler led to early tooth loss becoming a common trait among all Pitcain island inhabitants.

11. Sexual selection: Fruit flies prefer red-eyed mates, causing white-eyed individuals to die out rapidly in the population.

12. Natural selection: An offspring born with white fur was more visible to predators, leading to its predation and elimination from the population.
Nous sommes ravis de vous avoir parmi nous. Continuez à poser des questions, à répondre et à partager vos idées. Ensemble, nous créons une ressource de savoir précieuse. Chaque question a une réponse sur FRstudy.me. Merci de nous choisir et à très bientôt.