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...
domatium- a part of a plant (e.g., a leaf) that has been modified to provide protection for insects or mites or fungi pycnidium- flask-shaped asexual structure containing conidia stipule- a small leafy outgrowth at the base of a leaf or its stalk; usually occurring in pairs and soon ...
Inner part of yellow lily with pestle and stamens covered with brown pollen horizontal photo,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、
The expression pattern of GRAM domain-containing pro- teins under various experimental settings, in particular those related to ABA, suggests that they may play func- tions in the perception of environmental signals and hormone signaling23. However, the potential relevance, if any, of GEM in ABA...
The flower has always aroused great interest of researchers because it is considered the key innovation in the evolution of plants, featuring a very specia... S Teixeira,V Leite,F Leme,... - Wiley‐VCH Verlag GmbH & Co. KGaA 被引量: 0发表: 2016年 The ecology and evolution of wind pol...
Fruit set is normally initiated by two fertilization events occurring in the ovules. Ovules are complex structures found in all seed bearing plants, comprising protective integuments that surround the megagametophyte leaving an opening referred to as the micropyle. When the pollen tube successfully ent...
Earlier reports have considered the role of the MADS-box genes in parthenocarpy, such as the downregulation of TM29, a homologue of SEPALLATA, which causes the changing of both petals and stamens into sepals followed by pistil infertility, leading to parthenocarpic fruits in tomatoes [25]. ...