Biology, 02.03.2020 05:30 Meliiiii

How would you explain the presence of different species of birds on different islands that are in close proximity to each other?

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Different bird populations on each island need to adapt to different environments, thereby these populations will diverge over time and speciation occurs.

Adaptation refers to change (evolution) in order to best fit environmental conditions.The main mechanism by which species change over time is natural selection.In this case, bird populations on each island need to change (evolve) in order to adapt to different environments, thereby they will diverge by accumulating genetic differences and thus will form new species in a process called speciation.

In conclusion, different bird populations on each island need to adapt to different environments, thereby these populations will diverge over time and speciation occurs.

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Answer from: jholland03

Evolution by geographic isolation

Explanation:

To explain the presence of different species of birds on different islands that are close in proximity to each other, we use the concept of evolution by means of geographic isolation.

In this type of evolution, the birds originally must have a common ancestor. As at the time when the Islands were joined together, there must have been a prevalent gene flow among the specie.

As the Island drifted apart, the apparent gene flow was cut short and organisms had to evolve and device new evolutionary strategies to survive on their own.

This will lead to formation of new species of organisms now dominating and occupying the different Islands.

Answer from: Quest

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.

Answer from: Quest

wegner's theory did not explain how the continents could move

explanation:

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How would you explain the presence of different species of birds on different islands that are in cl...