英英释义 a powder produced by the male part of a flower , which is carried by insects or the wind and causes the female part of the same type of flower to produce seeds 发音 例句 1. Hummingbirds have discovered that nectar and pollen are very nutritious. 蜂鸟发现花蜜和花粉是很有营养的...
It makes sense that wind-pollinated plants would make a lot of pollen, to increase the chance of finding a female, but even in self-pollinated plants, such as tomato, each anther makes many more pollen grains than are needed for the available females in that flower. Pollen competition (i...
PURPOSE: A flowerpot in which seeds and culture soil are integrally commercialized is provided which simplifies growing of a flower in the flowerpot, displays bland indoor environment, and exhibits peculiar environment by furnishing the flowerpot on a wall or at a window. CONSTITUTION: The flowerpot...
Bees are a big part of the life cycle of plants,carrying pollen from one flower to another and allowing plants to produce their frequently yummy output.But with bee populations on the decline,what can take their place?How about soap bubbles(肥皂泡)?It may sound fantastical.But Eijiro Miyako...
In a flower, the part that holds the pollen is the ___. A. stamen B. pistil C. sepal D. ovary 相关知识点: 试题来源: 解析 A。解析:本题考查花朵结构。雄蕊(stamen)是花朵中承载花粉的部分。雌蕊(pistil)是接受花粉的部分,萼片(sepal)主要起保护作用,子房(ovary)是雌蕊的一部分,主要与结果相关...
Closeup of the inside part of a sunflower pollen.,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行、工商银行等数
Pollen production is a critical part of the plant reproduction process. Pollen is produced in a male flower's stamen, and it is a powder of grains that produces the sperm seeds of plants. The stamen is the male organ of the flower and contains a small stalk called a filament. The polle...
Most deciduous wind-pollinated trees (which shed their leaves every fall) produce their pollen in the spring while the branches are bare of leaves to reduce the surrounding surfaces that “compete" with the stigmas (the part of the flower that receives the pollen) for pollen. Evergreen coni...
题目 B. In flowering plants, the function of a male sex cell in the pollen is to___.(1) develop into a fruit(2) attract insects to the flower(3) fertilize the egg in the ovule(4) produce the female part of a flower (3)) 相关知识点: 试题来源: 解析 (3) 反馈 收藏 ...
Step-by-Step Solution:1. Understanding the Flower Structure: A flower is the reproductive organ of a plant. It consists of various parts, including the stamen (male part) and the pistil (female part).2.