(b)Explain the function of the pollen tube in fertilisation in flowering plants.(3) 相关知识点: 试题来源: 解析 1. idea of {forms a pathway/ grows down } through thestyle / eq ;2. grows towards { ovary / ovule / micropyle / egg cell /ea} ;3. reference to digestive enzymes;4. ...
This review deals with the structure and function of the pollen tube cytoskeleton from pollen germination to the formation of two sperm cells by division of the generative cell in the tube. The structure and function of microfilaments (MFs) and microtubules (MTs) are described in the binucleate...
The pollen tube is a tube that develops when a gametophyte, encased with a pollen grain from a plant, lands on the stigma of another plant. The pollen grain germinates, which allows the pollen tube to form and work its way down the style of the plant to the ovule. Once the pollen gr...
hilus of the spleen 【医】 脾门 相似单词 spleen n. 1.坏脾气,怒气,怨气 2.脾脏 stomach n. 1.[C]胃 2.[U]肚子 3.[U]忍受能力 v.[T] 1.忍受 2.食用,吃(食物) function n.[C] 1.官能,机能 2.功能,作用;用途;目的 3.职责;职务;职业 4.重大聚会,宴会;宗教仪式 5.【数】函数 6....
Here, we first survey advances in the cellular and molecular understanding of angiosperm pollen and stigma biology, including pollen-stigma adhesion, pollen hydration and germination, and pollen tube emergence and invasion. By capitalizing on microscopy, molecular, genetic, and genomic resources, it is...
Pollen tube reception involves a pollen tube-synergid interaction that controls the discharge of sperm cells into the embryo sac during plant fertilization. Despite its importance in the sexual reproduction of plants, little is known about the role of gene regulation in this process. We report here...
Function of the DEMETER DNA glycosylase in the Arabidopsis thaliana male gametophyte In double fertilization, the vegetative cell of the male gametophyte (pollen) germinates and forms a pollen tube that brings to the female gametophyte two ... VK Schoft,C Nina,C Yeonhee,... 被引量: 0发表:...
Seed, the characteristic reproductive body of both angiosperms and gymnosperms. Essentially, a seed consists of a miniature undeveloped plant (the embryo), which, alone or in the company of stored food, is surrounded by a protective coat. Learn more abou
Pollen Tube | Overview & Function Pollen Grain Definition, Features & Function Seeds Lesson Plan for Elementary School Endosperm Definition, Function & Types Parts of a Seed: Lesson for Kids Seed Dissection Lesson Plan What is a Seed? - Lesson for Kids Parts of a Seed Lesson Plan Create an ...
Pollen Tube | Overview & Function Archegonium & Antheridium | Definition, Structure & Function Antheridium Location & Function The Role of Seed and Pollen Grains in Life on Land Start today. Try it now Holt McDougal Modern Biology: Online Textbook Help 50 chapters | 386 lessons Ch ...