英文字典中文字典51ZiDian.com

中文字典辞典英文字典 a b c d e f g h i j k l m n o p q r s t u v w x y z

protonema

n. 原丝体,丝状体

原丝体,丝状体

The Collaborative International Dictionary of English v.0.48 (gcide)

Protonema \Pro`to*ne"ma\, n.; pl. {Protonemata}. [NL., fr. Gr. ?
first ?, ?, a thread.] (Bot.)
The primary growth from the spore of a moss, usually
consisting of branching confervoid filaments, on any part of
which stem and leaf buds may be developed.
[1913 Webster]

请选择你想看的字典辞典：

单词	字典	翻译
protonema	查看　protonema　在百度字典中的解释	百度英翻中〔查看〕
protonema	查看　protonema　在Google字典中的解释	Google英翻中〔查看〕
protonema	查看　protonema　在Yahoo字典中的解释	Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!

中文字典英文字典工具:

选择颜色:

<style type="text/css">#word104_1 br {display:none;}</style>
<form id="word104_1" method="post" action="http://51zidian.com/index.php" target="_blank">
<div style="width: 140px;border:1px solid #000;background-color:#ffffff;padding: 0px 0px;margin: 0px 0px;align:center;text-align:center;overflow:hidden;"><div id="xcolor1_1" style="font-size:12px;color:#183a00;line-height:16px;font-family: arial; font-weight:bold;background:#94abf0;padding: 3px 1px;text-align:center;"><a href="http://51zidian.com/" alt="英文字典中文字典" title="英文字典中文字典" id="word_name104_1" style="color:#000000;font-size:14px;text-decoration:none;line-height:16px;font-family: arial;" >英文字典中文字典</a></div><table width=100% style='align:center;text-align:left;font-size:12px;background-color:#ffffff;color:#333333;'>
<tr><td style="text-align:center;border:0"><input type=hidden name="word104_hi" value="1">输入中英文单字</td></tr><tr><td style="text-align:center;border:0"><input type="text" name="word104_input" value="" size=10 style="background-color:#ffffff;color:#000;text-decoration:none;font-family: arial;rial;border:1px solid #999;padding:1px!important;"></td></tr><tr style='line-height: 26px;'><td style="text-align:center;border:0"><input type=submit style="background-color:#ccc;color:#000;border:0 none;cursor:pointer;" value="查询字典"></td></tr></table></div>
</form>

英文字典中文字典相关资料:

Protonema - Wikipedia
A protonema (plural: protonemata) is a thread-like chain of cells that forms the earliest stage of development of the gametophyte (the haploid phase) in the life cycle of mosses
Protonema | anatomy | Britannica
The protonema, which grows directly from the germinating spore, is in most mosses an extensive, branched system of multicellular filaments that are rich in chlorophyll
Protonema - an overview | ScienceDirect Topics
Protonema is defined as the filamentous tissue that emerges first from the spore in moss gametophytes, composed of two main cell types—chloronemal and caulonemal cells—serving to establish the plant
PROTONEMA Definition Meaning | Dictionary. com
PROTONEMA definition: a primary, usually filamentous structure produced by the germination of the spore in mosses and certain related plants, and from which the leafy plant which bears the sexual organs arises as a lateral or terminal shoot See examples of protonema used in a sentence
What is Protonema class 11 biology CBSE - Vedantu
A protonema is a thread-like chain of cells that forms the gametophyte's earliest stage of growth in the life cycle of mosses When a moss grows from a spore, it begins as a germ tube that lengthens and branches into a filamentous complex called a protonema, which develops into a leafy gametophore, the adult form of a gametophyte in bryophytes
Protonema: General Biology I Study Guide | Fiveable
Protonema is a filamentous stage in the life cycle of mosses that develops from the germination of a moss spore This initial structure plays a crucial role in establishing the gametophyte, which is the dominant life stage in bryophytes
Protonema Definition and Examples - Biology Online Dictionary
Protonema in the largest biology dictionary online Free learning resources for students covering all major areas of biology
PROTONEMA Definition Meaning - Merriam-Webster
The meaning of PROTONEMA is the primary usually filamentous thalloid stage of the gametophyte in mosses and in some liverworts comparable to the prothallus in ferns
What does protonema mean? - Definitions. net
A protonema is a thread-like chain of cells that forms the earliest stage of a bryophyte life cycle When a moss first grows from the spore, it grows as a protonema which develops into a leafy gametophore
Protonema - definition of protonema by The Free Dictionary
protonema (ˌprəʊtəˈniːmə) n, pl -nemata (-ˈniːmətə) (Botany) a branched threadlike structure that grows from a moss spore and eventually develops into the moss plant [C19: from New Latin, from proto- + Greek nēma thread]

中文字典-英文字典 2005-2009