Hints: mole rat Damara extract germinate

Living on its own, a single mole rat would never find enough to eat. So these small rodents have evolved a cooperative life style with up to 40 family members working together. Like ants or bees, only the queen mole rat breeds and all her workers are sterile females. But everybody will benefit from the extra mouths who eventually join in the hunt for food.
Damara mole rats are unusual in that their lips are actually behind their front teeth. It helps them to avoid swallowing sand while digging. But it also stops them drinking. So they must extract all the moisture they need from the bulbs.
During the wet season, the bulbs are gathered quickly before they germinate and lose their goodness. The mole rats store them in special larders as insurance against the dry months ahead.

这篇材料你能听出多少？点击这里做听写，提高外语水平>>