Hence we may infer as highly probable that, if the whole genus of humble-bees became extinct or very rare in England, the heartsease and red clover would become very rare or wholly disappear. The number of humble-bees in any district depends in a great... The National Review - Стр. 200редактор(ы): - 1860Полный просмотр - Подробнее о книге
| 1914 - Страниц: 764
...57-58) : "Hence we may infer as highly probable that, if the whole genus of bumblebees became extinct or very rare in England, the heartsease and red clover...become very rare or wholly disappear. The number of bumblebees in any district depends in a great measure on the number of field mice which destroy their... | |
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