New York State Chemistry RegentsNew York State Earth Science Regents

 
Living Environment Regents June 2006 Question 69 PDF Print E-mail

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Correct Answer: Biological evolution.

Evolution is the change in the genetic material of a population of organisms from one generation to the next. Though the changes produced in any one generation are small, differences accumulate with each generation and over time because substantial changes in the organisms. This process can culminate in the emergence of new species, of which happened to the finches of Galapagos island. Indeed, the similarities between finches suggest that all known species are descended from a common ancestor (or ancestral gene pool) through this process of gradual divergence.

Option 1 is incorrect. Biodiversity is not absent in the situation stated. It was said that there were 14 varieties of finches; therefore, there is biodiversity in the island.

Finches reproduce sexually. The male bird's sexual organs consist of paired testes. The female bird's sexual organs consist of only a left ovary and oviduct. Hence, option 3 is incorrect. Asexual reproduction is the primary form of reproduction for single-celled organisms such the archaea, bacteria, and protists. Many plants and fungi reproduce asexually as well.

Though there is lack of competition in between the finch varieties, this has no direct effect on the variety of finches that arose.

 

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