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Finch in a Pinch Lab Report

As scientists, we have come to this island to observe the evolution of finches when forced into an unfamiliar habitat with a changing food supply.

We believe our finch, Pherous robustus, will have a good chance at survival because its beak will allow for the finch to grasp many different seed shapes and sizes.

During our first 5 years, corn grew well on the island. Our finch population steadily increased during this time period. Our finch was very well adapted to eating the corn because it was very easy for our finch to pick up.

During the next five years there was a drought and only block plants grew. Our finch population steadily decreased during this time period because our finches could not pick up the seeds. They were much too large for their medium sized beaks. Our finches were not well adapted to the block plant seeds.

During the 10 - 15 years, the block plants died out and the pony bead plants took over. The pony bead seeds were very tiny, however our finch was versatile enough to ha


Tweezeris bentails 149 146 146 146 145 151 150 157 162 166 161 172 172 174 172 169 164 172 177 178

In the final generation of finches studied, all previous types of food was available. In this case all birds thrived, for they had the choice to eat whichever food they were best adapted to eat.

Tweeseris pointus 155 156 165 172 178 177 180 181 181 179 184 192 192 193 200 202 204 201 208 212

The adaptations that the finches evolved on the original island made some finches more successful at food acquisition on the new island. Due to allopatric speciation the isolated population began to deviate form the parent population because of the founder effect and is was less likely to gene flow. The isolated finch population began to diverge genetically under the pressure of different selective forces. The linage is then spread through cladogenesis.

During the final generations of our finches the drought ended and all types of foods could be grown again. In this type of environment, our finch population steadily increased because the corn and the pony beads were both present as well

Some common words found in the essay are:
Population Specie, Report Statement, finch population, finch population steadily, pick blocks, pony bead, pherous robustus, plierous normalis, food sources, population steadily, pony bead seeds, population steadily increased, died pony bead, steadily increased, finches studied, finch adapted,
Approximate Word count = 733
Approximate Pages = 3 (250 words per page double spaced)


  

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