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kondor19780726 [428]
3 years ago
10

Charles Darwin observed a unique beak size and shape in the finch population of each of the Galapagos Islands that he visited. W

hich is the most likely cause of the observed variation?
Biology
2 answers:
prohojiy [21]3 years ago
5 0
The most likely cause of the beak variation is the food source of the finch, the break size and shape was adapted to most likely have easier and better access to food.  <span />
KATRIN_1 [288]3 years ago
4 0

Answer:

Competition for available food resources (plants, seeds, insects, cactus etc)  among themselves.

Explanation:

The ancestral finches were the seed eating stock that fed on seeds. These ancestral finches diversified according to different types of food due to competition for available food resources (plants, seeds, insects, cactus etc) among themselves. This led to diversification of ancestral stock and evolution of unique beak size and shape in the finch population of each of the Galapagos Islands.

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The introduction of Coqui frog took place accidentally from Puerto Rico into Hawaii in the year 1988. The introduction of the frog species has posed a danger to the island ecosystem of Hawaii and is also a source of major noise nuisance. The species of the frog has an enormous urge to eating, which is putting the native species of spiders and insects of the island at a greater risk.  

The Coqui frog species can even thrive in distinct ecological zones and heights in the region and are also witnessed at the height of 4000 feet above the level of the sea. These frogs can also compete with the local fauna and the endemic birds, which are solely dependent on insects as the source of their food.  

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