Homosporous ferns produce sporophytes by intra gametophytic selfing, inter gametophytic mating, or apogamy.Gametangium ontogeny, genetic load, and ploidy affect the mating system of each species.
摘要
型孢
蕨类的孢
可经





、异



两类
育系统或以无
生殖的方式产生,异



又可分为异



和异

异
两种方式。
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6月合集
2月合集 
2013
3月合集
2

2020
3月合集 And I've mentioned this before, and I want to go into more depth here because it is so crucial for sustaining passion for sustaining friendship for sustaining happiness, individual intra personal, as well as interpersonal, happiness.
之前已经提到过这一点,
想在这里更深入地介绍,因为它对于维持激情、维持友谊、维持幸福、个人内部和人际幸福至关重要。