A perfect flower is “monoecious,” meaning it has both male (stamen and anthers) and female (style and stigma) parts in them. This means you don’t have to identify male and female flowers, so hand-pollinating them is as easy as shaking them. When you shake them, pollen falls from ...
Answer and Explanation:1 Pollinators carry pollen from one plant to another which causes the formation of seeds. These seeds often serve as a direct source of food for humans... Learn more about this topic: Natural & Human Disturbances that Affect an Ecosystem ...
The bee hummingbird does a great job performing its part in plant reproduction(繁衍). During the course of a single day,the bee hummingbird can visit up to 1,500 flowers. And just like a bee, when the bee hummingbird drinks nectar(花蜜) from a flower, pollen(花粉) is moved from the...
Thisimportantprocessiscarriedoutbymorethan200,000differentanimalspeciesknownaspollinators.Fliesandbeetles—theoriginalpollinators—dateback130millionyearstothefirstfloweringplants.Birds,butterflies,andantsalsodotheirpart.Evennonflyingmammalshelpout:monkeystearopenflowerswiththeirhands,accidentallyspreadingpollenintotheair...
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F. Nowak says there is a downside to trees too, such as pollen allergy (花粉过敏) or large tailing branches in storms, and people don’t like sweeping leaves. But, he says, there are ways cities and counties can manage trees to help communities thrive (繁荣). Urban forests especially ...
The Oleander Hawk Moth plays a vital role in the ecosystem. As pollinators, they spread pollen between plants, enabling fertilization and plant reproduction. Their population status directly affects native plant communities, as well as the health of other wildlife that depend on these plants for fo...
The Dead Horse Arum is also one of a rare group of thermogenic plants. It can raise its own temperature, a handy trick to convince those flies that it really is hot, dead, flesh. How rotten is that? The Corpse Plant does this as well. Incidentally, other plants that are thermogenic in...
故选A。(2)词义猜测题。根据第三段pollentotheflowers(花粉到花上)可知,他们必须把花粉转移到花上。故选C。(3)细节理解题。根据第四段Thepeppersarered.Thatmighthelpastronautsfeelbetter.(辣椒是红色的。这可能有助于宇航员感觉更好。)可知,是因为辣椒是红色的,所以宇航员感觉更好。故选A。(4)推理判断题。
How do steroid hormones exert their action? What is the purpose of the light reactions? Why do all flowers produce pollen, but not all produce nectar? (a) What is gluten? (b) Why do some people want to be gluten-free? What does the diencephalon develop into?