A. They make honey. B. They are beautiful. C. They help plants reproduce. D. They live in hives. 相关知识点: 试题来源: 解析 C。解析:蜜蜂对植物很重要是因为它们帮助植物繁殖。选项 A 它们制造蜂蜜不是对植物重要的原因;选项 B 它们美丽不是重要原因;选项 D 它们住在蜂巢不是对植物重要的原因。
完形填空题:阅读下面的短文,从每题所给的选项中选择一个最佳答案填空。The world is full of wonders, and one of the most fascinating is the honeybee. Bees are essential for our ecosystem because they play a crucial role in pollination. Without bees, many of o
Sweet cherry cultivars tend to be self-unfruitful, so planting mixed blocks of compatible pollinizers is crucial to successful cross-pollination that leads to quality production. Achieve adequate levels of pollination in the orchard by planting every fourth tree location and every fourth row with a...
Grow only one kind of tomato in your garden.If that feels too limiting,go ahead and experiment.Choose plants that grow well every year so there are smaller risks from cross-pollination.The plants will be fine even if they are not what you expected....
Organizations may have concerns about maintaining culture and community when they extend greater flexibility to the workforce. Without watercooler chats or opportunities to interact with colleagues outside of your job function, it can be difficult to facilitate the cross-pollination of ideas. And if ...
Darcy's garden as they read Pride and Prejudice. Supporters argue that sound effects are the next logical development for e-books and will add excitement for younger readers. Critics, however, will argue that the noises will ruin the simple pleasure of enjoying the imagination required to read ...
and are not grown commercially.Open pollinatedmeans the plants are pollinated naturally by birds, insects, and the wind. They do not require controlled or manual pollination, as do many hybrid cultivars. Open pollinated plants produce new generations of the same type, but genetic traits will va...
that are considered pests in the garden, such as caterpillars, beetle larvae, and flies. They also assist in pollination by feeding on the nectar of flowers. If you find a nest in an out-of-the-way location where no one is likely to stumble upon it, you may want to leave it alone....
There's also no real way to prevent cross contamination (交叉污染) between modified crops and natural crops.When neighboring fields are planted with different varieties of computable(可共存的) plants there is a virtual guarantee of some cross pollination between the fields. We have no idea of th...
Sometimes things will get worse before they get better.Just hang on!When Loretta began to have seizures from low blood sugar we just knew her hours were numbered. I was shocked when my teaching partner text the next morning that she had made it through the night. She then endured two umbi...