Sexual reproduction can bring about genetic commingling . 有性繁殖可取得杂交遗传。
Why , therefore , bother with the whole messy business in the first place 那为什么还要那么麻烦地去做有性繁殖呢?
On top of that , the need for each individual to have two parents means the population can grow only half as rapidly as it otherwise might 再加上,每一个体都有双亲这一现实情况表明了有性繁殖比无性繁殖的人口增长速度慢一倍。
And vice chairman of the nbb ningxia biology board , has spent ten years on this technique . this technique made important breakthroughs both to the plant tissue culture technique and to the conventional seedling techniques 人类从古至今在开发利用经济植物的历程中,除了利用种子有性繁殖技术以外,曾不倦地对植物无性繁殖技术进行了许多探索和创新。