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The Evidence That Shows How Different Species Are Related

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Alona Herron

on 9 February 2016

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Transcript of The Evidence That Shows How Different Species Are Related

They comprise 14 closely related species that differ in beak shapes and sizes and live on the Galapagos islands.
Finch Variation
Finches Adaption
the formation of new and distinct species in the course of evolution.

the activity or condition of competing.

production of more of product,commodity,or substance than is wanted or needed.
Monday, February 8, 2016
Vol XCIII, No. 311
Natural Seclection
The Finch Competition
Their beaks have evolved over time to be best suited to their function. For example, the finches who eat grubs have a thin extended beak to poke into holes in the ground and extract the grubs. Finches who eat buds and fruit would be less successful at doing this, while their claw like beaks can grind down their food and thus give them a selective advantage in circumstances where buds are the only real food source for finches
finch once had its own kingdom on the Galapagos Island of Daphne Major. It had its pick of seeds to eat. But the arrival of another species of finch about 20 years ago, and additional food competition from a drought on the island in 2003, changed everything.
The Evidence That Shows How Different Species Are Related

*natural selection:
the process whereby organisms better adapted to their environment tend to survive and produce more offspring.

a change or difference in condition, amount, or level, typically with certain limits.

* adaption:
the action or process of adapting or being adapted.

The shape of the feet reflects the habitat that the bird will be found in and the type of food it might eat.







Well-fed Zebra Finches will usually re-nest several times, but it is best to limit them to 2-4 clutches per year. More than that may tax the female’s strength and shorten her lifespan.

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