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,所以B、C、D错误。反馈...
Pollen becomes (attach) to the animal during its visit to a flower which is then passed on to another plant’s blossom on its next visit. (用所给单词适当形式填空) 相关知识点: 试题来源: 解析 attached 【详解】考查形容词。句意:当动物来到一朵花的时候,花粉就依附在动物身上,然后随着动物的...
A correlation was found between the number of inflorescences-and thus overall flower production-and airborne pollen counts. Production parameters also varied as a function of olive grove location, although that variability was not clearly attributable to the elevation. The correlation between production ...
But stigmas create turbulence, which slows the air speed around them and may help pollen stick to them. 9.According to paragraph 4, which of the following is NOT an adaptation that helps ensure that pollen travels as far as possible? A. Pollen-producing flowers and catkins are located ...
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 Eijir...
Producing heat serves two purposes. It magnifies the scent of the flower and it helps the beetles maintain their body temperature. When a beetle arrives at the flower, the flower closes around it for about 24 hours so that the beetle becomes covered with pollen. Then when the flower opens,...
The Life Cycle Of A Flower: Quick Version Below is a TLDR / condensed version of the life cycle of a flower. You’ll find the whole process described in greater detail further down the page. Pollen grainsandembryo sacsare produced in the male and female parts of a flower respectively. ...
The honeybee collects nectar from the flower and in the process, it spreads pollen for the flower. This relationship is _. A. mutualism B. parasitism C. commensalism D. predator - prey 相关知识点: 试题来源: 解析 A。解析:蜜蜂(honeybee)从花中采集花蜜,同时为花传播花粉,双方都受益,这是互利...
or producing many flowers at once may increase the number of pollinators a plant attracts.Other characteristics of flowers are also important.Features such as color, scent and shape attract pollinators, as does the reward in the flower, the pollen or the nectar, that feeds the pollinator.For ...
1. Which of the following is NOT part of a megametophyte? Pollen grain Synergids Polar nuclei Antipodal cells 2. In the transition from vegetative growth to floral growth the ___ must be transformed into the ___. This involves a shift from ___growth to ___growth. apical meristem...