Friday, February 6, 2009

Vincent van Gogh Wheatfield under a Cloudy Sky

Vincent van Gogh Wheatfield under a Cloudy SkyClaude Monet Water Lilies 1903Claude Monet Bridge over a Pool of Water Lilies
change, while the separate-sex strategy responds by altering the number of male and female offspring it produces.related species flexibly changes sex? A comparative study of hermaphroditic and separate-sex mating systems, which the authors are currently performing, may provide a clue, according to Kazancıoğlu, "Reproductive behaviors such as parental care seem to disfavor sex change in some species. We are investigating whether general patterns like these may explain the rarity of hermaphroditism."
Yale University and the National science Foundation funded the research"We were surprised to see that a hermaphrodite could spend 30 percent of its lifetime in the process of change sex, and still persist in a population," said Kazancıoğlu. "This suggests that only huge costs can disfavor sex change."So, why is sex change so rare? And, why does one species of fish reproduce strictly as separate sexes, while another very closely

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