pollen造句
31. Last year, because it rained frequently during cypress season, pollen levels stayed relatively low.
32. One that also produces pollen can generate plants that spread far and wide.
33. It takes more than a strip at the edge of a field to stop pollen grains from spreading round the countryside.
34. But by far the most refined technique for the interpretation of aggradation deposits is that of pollen analysis.
35. Induk said, exhaling, dispersing my ashes like pollen into the night air.
36. He had severe asthma, and a doctor suggested he try a sport that took him away from grass and pollen.
37. To advertise the fact, they surround the pollen and the anthers that produce it with the vivid petals of a flower.
38. No pollen analyses of undisputed late-glacial deposits from the Outer Hebrides have been published.
39. When calculated on an appropriate pollen sum, they suggest that there was never any extensive, continuous forest cover.
40. A law of diminishing returns applies to seed but not to pollen.
41. But whether the parent with the yellow flowers supplies the egg or the pollen makes not the slightest difference.
42. The pollen count is usually much lower in the winter.
43. Some varieties do not produce good pollen, others are very good, but are poor receivers and not good seed-bearers.
44. If its own pollen is there, why accept an outsider?
45. The Aponogeton species are self-fertile, responding to pollen from the same or different plants.
46. For instance, some animals may help to transfer pollen from one plant to another without acting directly as the carrier themselves.
47. In one investigation, he even tried to convert pollen into beeswax.
48. They have released pollen from genetically modified plants into the environment, claiming that it will not spread.
49. In female flowers, the flies are wedged in tightly, the thorax pollen being rubbed off on to the stigma.
50. Hay fever is really an allergy to pollen and the peak time is early June.
51. They too rely on the wind to distribute their pollen.
52. When the pollen count is high, keep doors and windows shut and stay inside.
53. The pollen is usually transferred by tiny insects visiting the sweet and colored flowers where these plants are cultivated.
54. For example, the pollen of modified crops had already been shown to be poisonous to monarch butterfly larvae.
55. But they are not for effect, they are to keep pollen and blowing sand and wind out of his contact lenses.
56. A whole pine forest produces so much pollen that ponds become covered with curds of it - and all of it wasted.
57. At the start of the season sufferers usually begin to experience problems when the pollen count reaches 50.
58. These attract a small moth with a specially curved proboscis that enables it to gather pollen from the yucca stamens.
59. Huge fans in the basement of Bio2 pushed the air around for some semblance of wind, but it hardly moved pollen.
60. However, it is important to remember that the pollen zones are not uniform across large areas.
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