Our findings indicate that both opsin genes have been under purifying selection in the majority bats despite a long history of nocturnality.
但对恒频蝙蝠而言,视觉退化原在有一种更发达回声定位能力。
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Another paper from 2018 looked at the genes that code for opsin in 154 modern mammals.
2018 年的另一篇论文研究了 154 种现代哺乳动物中的基因。
These researchers found that all mammals have lost a number of genes that code for certain opsin proteins, indicating that mammal eyes are adapted to low-light conditions.
这些研究人员发现, 所有哺乳动物都丢失了许多某些的基因,这表明哺乳动物的眼睛适应了弱光条件。
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