div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: β-Carotene and Sexuality in the Mucoraceae src=https:reader031fdocumentorgreader031viewer2022020523575068221a28ab0f07aec148html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1963 Nature Publishing Grouppdiv