森林“小王子”——龙蜥

蜥蜴的种类繁多,如石龙子、草蜥、壁虎、蛇蜥、变色龙、巨蜥等,还有本文要介绍的龙蜥。龙蜥因为善于爬树,多在树上生活,又称攀木蜥蜴。龙蜥和其它蜥蜴类最大的区别是它们的脚爪。壁虎脚趾皮瓣由许多分叉细     

蜥蜴(二)

希拉毒蜥蜥蜴中只有两种的咬噬是具有毒性的—希拉毒蜥和墨西哥珠蜥。这两种毒蜥都产自北美洲南部。图示的希拉毒蜥公布在干燥且杂本丛生的地区,白天躲在洞穴里,夜间出来猎食小动物,如小老鼠、鸟蛋和其     

无翅的滑翔高手

花样滑翔高手——飞蜥飞蜥身体两侧各有一把皮“折扇”——翼状皮膜,平时不飞的时候,皮膜像扇子一样折向体侧后方。当想飞时,飞蜥就将身体两侧的皮膜向外展开,尾部两侧的锯齿状结构在空中保持平衡和调整方向,享受滑翔的乐趣。飞蜥最拿手的是花样滑翔,尤其是环形飞行。     

江苏徐州首次发现丽纹龙蜥

徐州首次发现丽纹龙蜥 ,笔者将对该蜥种开展进一步的观察及研究     

琅琊山三种蜥蜴贮能部位水分含量和能值的研究

研究了安徽滁州琅琊山北草蜥(Takydrom us septentrionalis)、蓝尾石龙子(Eum eces elegans)和蜓(Sphenom orphus indicus)主要贮能部位水分含量和能值。研究结果显示:三种蜥蜴成、幼体肝脏水分含量无显著差异。北草蜥、蜓幼体躯干的水分含量显著高于成体;蓝尾石龙子躯干水分含量在成、幼体间无显著的差异。幼体躯干水分含量大小顺序为北草蜥、蜓、蓝尾石龙子;成体躯干的水分含量表现为北草蜥显著高于蜓和蓝尾石龙子。北草蜥成体躯干、脱脂躯干能值显著高于幼体;肝脏能值、脱脂肝脏能值不存在显著的差异;蓝尾石龙子成幼体的躯干能值、脱脂躯干能值、肝脏能值、脱脂肝脏能值均无显著差异;蜓成体的脱脂躯干能值显著高于幼体,但成幼体的躯干能值、肝脏能值、脱脂肝脏能值均无显著差异。北草蜥成体腹脂肪体的能值显著高于幼体。     

春季环境因子对密点麻蜥活动规律的影响

作者为商丘师范学院生物系闫永锋、刘秀花等 .全文发表于生物动物学类核心期刊、中国动物学会和中国科学院动物研究所主办的《动物学杂志》1999年第 34卷第 3期 .密点麻蜥属于两栖类、是变温动物 ,其活动规律深受环境因子的影响 .本文以详尽的科学统计资料从多个方面讨论了春季环境因子对密点麻蜥活动规律的影响 .结果表明 :四月份 ,当气温为 18 8～ 2 1 4℃、栖息地地温为 31 5～ 36 4℃、近地温为 2 6 9～ 2 9 8℃、光照度为 33 3× 10 3～ 58 2× 10 31ｘ时 ,最适合它们的活动 .五月份 ,最适合它们活动的环境条件是 :气温 2 2～ 2 8 8℃…     

异变生物?恶暴蜥

公元5526年,一群疯子科学家建立了一个秘密基地,制造了一群令人毛骨悚然的恐怖生物,危害世界并以此为乐。恶暴蜥就是其中一种恐怖生物。但因一位科学家忘记给恶暴蜥装上控制芯片,恶暴蜥从玻璃管里逃了出来,不知所踪。时隔半年,恶暴蜥已增加到500多只,足以危害社会。“灭蜥”行动由此展开！     

《艺术大魔法》

正在小蜥蜴(xi yi)马蒂(di)的眼中,著名画家达芬蜥的形象闪闪发光!在著名画家达芬蜥的眼中,小蜥蜴马蒂就是一个拿着颜料捣蛋的小鬼。可不,瞧他干的好事儿!达芬蜥被马蒂泼了一身的颜料,厚厚的颜料干了后全部裂了开来,啪啦啪啦掉了一地。     

用紫外线求婚

美国动物学家最近发现,紫外线竟然也能成为某种动物的“独出心裁”的择偶手段,这种用紫外线进行择偶的动物是生活在热带丛林中的安乐蜥。很多年前,人们就已发现这种蜥的视网膜上长有对紫外线感应的细胞。至于这类细胞为什么能对安乐蜥的择偶起作用,长期以来一直是个谜。如今,这个谜已经得到了破解。原来,雄性安乐蜥的颈部长有一个喉囊,能反射紫外线,当它们求偶时,便拼命鼓起喉囊,将空中的紫外线向四周反射出去。这时,藏在树丛中的雌性安乐蜥眼底视网膜上的感应细胞便能感受到雄性安乐蜥发来的“求婚信号”,于是立即兴冲冲地应邀赴约。可是正…     

我是骆驼

小资料沙漠里的动物沙漠里生活羞沙狐、毒蜥、跳鼠等动物。跳鼠白天钻进洞里躲避酷热,到夜晚天气凉快时才出来寻找食物。希拉毒蜥在粗壮的尾巴里     

云南紫萁科(Osmundaceae)植物的分类研究

研究了云南产紫萁科植物的科下分类，并列出所有种类，对每种及变种记有简要文献引证和相关异名．该科植物在云南现知有3属4种1变种．文中提供了分属检索表，以使这3个属之间的特征更为清晰．     

生物分类学发展的新方向--DNA分类学

生物分类学是生物学研究的基础．但近年来分类学的发展面临许多问题，一种新的分类学——DNA分类学试图解决这些问题．DNA分类学是运用DNA序列对生物进行鉴定．本主要介绍DNA分类学的定义、基本过程、应用情况及其优势和需要解决的问题．DNA分类学是在形态分类学的基础上，对分类学发展的有益探索．     

“独立”抑或“从属”——提喻之本质、形式与作用的认知新解

在区分＂部分-整体关系＂与＂种属关系＂的基础上,厘清了提喻的本质,明确了其表现形式,肯定了其认知作用,认为提喻不同于换喻;从认知的角度来看,提喻是一种基于语义包含关系、包容性更广和包容性稍窄的范畴之间的概念转换,表现为以种代属或以属代种。其认知作用主要是通过概念转换,扩大或缩小认知范畴。     

Species concepts and biodiversity in Trichoderma and Hypocrea：from aggregate species to species clusters？

Trichoderma/Hypocrea is a genus of soil-borne or wood-decaying fungi containing members important to mankind as producers of industrial enzymes and biocontrol agents against plant pathogens, but also as opportunistic pathogens of immuno-compromised humans. Species identification, while essential in view of the     

复性速率液相分子杂交法测定芽孢杆菌DNA杂交度

报道采用热变性温度法(Tm)测定枯草芽孢杆菌和短小芽孢杆菌的DNA中G+C mol%分别为42.7mol%和40.26 mol%,与文献报道相一致,说明该法可为细菌分类学提供可靠的分子生物学数据.采用复性速率液相杂交法测定上述两菌DNA-DNA杂交度为9.66%,显示枯草芽孢杆菌与短小芽孢杆菌为同属中相互关系并不十分密切的两个种.     

A Review of Multiple-Choice Item-Writing Guidelines for Classroom Assessment

A taxonomy of 31 multiple-choice item-writing guidelines was validated through a logical process that included two sources of evidence: the consensus achieved from reviewing what was found in 27 textbooks on educational testing and the results of 27 research studies and reviews published since 1990. This taxonomy is mainly intended for classroom assessment. Because textbooks have potential to educate teachers and future teachers, textbook writers are encouraged to consider these findings in future editions of their textbooks. This taxonomy may also have usefulness for developing test items for large-scale assessments. Finally, research on multiple-choice item writing is discussed both from substantive and methodological viewpoints.     

嗜蛛姬蜂族Polysphinctini的分类研究进展

本文系统地综述了嗜蛛姬蜂族分类沿革和分类系统,世界嗜蛛姬蜂族的属及种类的地理分布情况,最后展望对嗜蛛姬蜂族的分类研究前景及其意义。     

Digital play: a new classification

Abstract

This paper draws on an ESRC-funded study of play and creativity in preschool-aged children’s use of apps in the UK. The main objectives of the study were to collect information about access to and use of apps in the home, establish the most popular apps and identify the features of those apps that are successful in promoting play and creativity. A mixed-method approach was used to collect data, including video filming of children using the most popular apps. In identifying play types that emerged in the analysis of data, the team utilised an established taxonomy, which outlines sixteen play types. This taxonomy was reviewed and adapted to analyse data from the project relating to digital play. Through this process, an additional type of play, transgressive play, was identified and added to the taxonomy. The paper outlines the implications of the revised taxonomy for future studies of play.     

How Trainees Transfer What They Have Learned: Toward a Taxonomy of Use

Researchers have consistently advocated for clearer concepts and better operational definitions of measures of training transfer. To clarify what trainees actually do on the job, we defined transfer as use on the job of what was learned in training and developed a prototype taxonomy of use. To form the taxonomy we asked, “How do relatively autonomous workers, taught open skills, use in their work what they have learned from training?” To create categories of use, we analyzed, defined, and reorganized former trainees’ stories of application from studies by Yelon and others (Yelon, Reznich, & Sleight, 1997; Yelon, Sheppard, Sleight, & Ford, 2004; Yelon, Ford, & Golden, 2013). We identified, as part of the prototype taxonomy the actions, content, conditions, tasks, purposes, and beneficiaries of different types of use. We discuss how this multidimensional framework provides a way of conceiving of and measuring transfer as use and the implications for practice and research.