lower vertebrates

In lower vertebrates, the pineal gland has an eye like structure and it functions as a light receptor and is considered by some to be the evolutionary forerunner of the modern eye.
En vertébrés inférieurs, la glande pinéale a une structure semblable à celle des yeux, et il fonctionne comme un récepteur de lumière et est considéré par certains comme le précurseur de l'évolution moderne de l'oeil.
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