0
Add your answer:
Earn +20 pts
How did the finches help Darwin to formulate his theory of natural selection and evolution?
There were many islands and finches on each. The finches did not fly from their home island to other islands. Different islands had different food for the finches. Darwin noticed that where there were plenty of honeysuckle flowers for the birds to feed on, the finches there had long beaks. On islands where the best bird-food was small seeds, the finches had beaks more like canary beaks, short and strong. Darwin also noticed that the finches were all from the same original flock and had probably mixed up when the islands were closer together and they could fly to any island to feed. So Darwin concluded that when the finches became isolated on different islands, their beaks evolved to be most suitable for eating the food available. The birds with the wrong beaks died young and had few chicks and these chicks unfortunately for them inherited their parents silly beaks. The birds with the right beaks fed well and had lots of chicks who inherited good beaks. So eventually nearly all the finches on any given island had the most suitably shaped beaks.
What were the beaks of the finches adapted for?
eating nuts,insects etc.
What discovery lead Charles Darwin to develop his theories on adaptation?
finches on the Galapagos islands, darwin noticed that on different island each beak of the finch was different depending on the food avalible on the different islands so darwin presumed that as each finch moved to these islands their beaks changed
What traits showed that helped the finches survive and compete for limited resource?
their beaks
What accounts for the variation Darwin observed among island species?
Based on the study by Abzhanov et al. (Bmp4 and Morphological Variation of Beaks in Darwin's Finches. Science 2004 ), the differences in beak shape is partly determined by the expression of a signaling factor (Bmp4). Finches that have larger and broader beaks were shown to express Bmp4 earlier in development and at higher levels. Finches with different shaped beaks were able to exploit different food sources and this allowed the many beak shapes to remain present. After hundreds (or thousands) of years, the birds diverged and became different species.
How are the Galapagos finches different?
Their beaks are different
How are Galapagos finches different?
Their beaks are different
Why did Darwin think that the finches looked different on the various islands?
The different finches have different shaped beaks.
Had different shaped beaks depending on island they were from?
finches
What is the relationship between the galapagos finches' beak shapes and their environment?
The shape of the Galapagos finches' beaks is adapted to the type of food available in their environment. Different beak shapes allow the finches to efficiently exploit different food sources such as seeds, insects, or cactus flowers. This adaptation helps the finches survive and thrive in their specific habitat.
Why are the finches in the Galapagos called Darwin's Finches?
Charles Darwin discover the finches in Galapagos in 1831. He noticed that the finches beaks were different compared to the finch's in Ecuador.
What is the relationship between the galapagos finches beak shape and their environment?
the beaks adapted to what they ate. all the different beaks have different jobs
How Darwin's Finches provide evidence for evolution?
the beaks were different on every island
Based on Darwin's observation of the finches what explanation did he give as to how different types of beaks could have evolved?
there were variations in the beaks already.
How did the finches help Darwin to formulate his theory of natural selection and evolution?
There were many islands and finches on each. The finches did not fly from their home island to other islands. Different islands had different food for the finches. Darwin noticed that where there were plenty of honeysuckle flowers for the birds to feed on, the finches there had long beaks. On islands where the best bird-food was small seeds, the finches had beaks more like canary beaks, short and strong. Darwin also noticed that the finches were all from the same original flock and had probably mixed up when the islands were closer together and they could fly to any island to feed. So Darwin concluded that when the finches became isolated on different islands, their beaks evolved to be most suitable for eating the food available. The birds with the wrong beaks died young and had few chicks and these chicks unfortunately for them inherited their parents silly beaks. The birds with the right beaks fed well and had lots of chicks who inherited good beaks. So eventually nearly all the finches on any given island had the most suitably shaped beaks.
Why have finches strong beak?
Finches have strong beaks for cracking seed cases and nutshells.
Why are finches in the Gal and aacutepagos Islands a good example of speciation?
Answer this question… . Galápagos finches have different kinds of beaks that match food sources.
