Evolution of new physical traits in mollusks has declined and grown more predictable over time. Early mollusks evolved a unique physical trait once every 2 million years. That frequency began declining roughly 444 million years ago to about one new feature every 9 million years.
· 马琳 · 来源:tutorial资讯
Аврора Киба и Григорий Лепс. Фото: Sergey Elagin / Business Online / Globallookpress.com