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url url url url
  2. Weltenzyklopädie
  3. فرگشت دید رنگی در نخستی‌ها - ویکی‌پدیا، دانشنامهٔ آزاد
فرگشت دید رنگی در نخستی‌ها - ویکی‌پدیا، دانشنامهٔ آزاد
از ویکی‌پدیا، دانشنامهٔ آزاد
بابون

فرگشت دید رنگی در نخستی‌ها در مقایسه با بیشتر پستانداران هوددان بسیار نامعمول است. یک اجداد مهره‌دار دور از نخستی‌ها دارای چهاررنگ‌بینی بود،[۱] اما نیاکان پستانداران خونگرم و شبگرد، در زمان دایناسورها، دو تا از چهار مخروط را در شبکیه از دست دادند؛ بنابراین، بیشتر ماهیان استخوانی، خزندگان و پرندگان چهاررنگی هستند، در حالی که بیشتر پستانداران کاملاً دورنگ هستند، استثناهای سه‌رنگی در برخی پستانداران و کیسه‌داران،[۲] و تک‌رنگی در بسیاری از پستانداران دریایی هستند.

شبیه‌سازی سه‌رنگی (بالا) و دورنگی (زیر) از سیب‌های قرمز و سبز

منابع

  1. ↑ Jacobs, G. H. (2009). "Evolution of colour vision in mammals". Phil. Trans. R. Soc. B. 364 (1531): 2957–2967. doi:10.1098/rstb.2009.0039. PMC 2781854. PMID 19720656.
  2. ↑ Arrese, C. A.; Runham, P. B; Hart, N. S; Shand, J.; Hunt, D. M; Beazley, L. D (2005). "Cone topography and spectral sensitivity in two potentially trichromatic marsupials, the quokka (Setonix brachyurus) and quenda (Isoodon obesulus)". Proc. Biol. Sci. 272 (1565): 791–796. doi:10.1098/rspb.2004.3009. PMC 1599861. PMID 15888411. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
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