Tetraploid molluscs are of low viability but high fecundity and can produce larger gametes. Crosses between tetraploids and diploids can result in 100% triploids.
四倍体贝类存活力较低，但具有较高的繁殖力，能产生较大的生殖细胞，并能与二倍体杂交产生100%的三倍体。
The researchers suggest this animal survived because of high levels of fecundity and ecological flexibility and continuing low levels of isolation by distance.
研究者指出，驯鹿存活了下来是因为高产、高的生态环境适应性以及持续的由距离引起低隔离程度。
High or low temperature can influence survival, fecundity and longevity, and determine the form of winged or wingless morphs of aphids.
温度变化对不同蚜虫种类的生殖力、生存力以及有翅蚜产生与否有极大影响。
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