A number of processes operating during the first cell cleavages enable the left-right (LR) axis to be consistently oriented during Xenopus laevis development. Prior work showed that secondary organizers induced in frog embryos after cleavage stages (i.e. conjoined twins arising from ectopic induced primary axes) correctly pattern their own LR axis only when a primary (early) organizer is also p...

The Spemann organizer induces neural tissue, dorsalizes mesoderm and generates a second dorsal axis. We report the isolation and characterization of Smad10, which has all three of these Spemann activities. Smad10 is expressed at the appropriate time to transduce Spemann signals endogenously. Like the organizer, Smad10 generates anterior and posterior neural tissues. Smad10 appears to function d...

According to development requirements, a standardized management system is mainly used in basic information files, file statistics and query management, lending management. Development files for that school personnel more efficient functions within the scope of work documents, archiving promoting improve level records staff, increase their strength, speed up on pace technology make efficient. T...

Sweden has to prepare for a papy boom, a French term for the increasing proportion of senior citizens in society, viz. those aged 65 years or older. This paper focuses on a municipal organizer’s decision-making process to arrange an open, municipal architecture competition with the aim of promoting future-oriented architecture for senior citizens. A sample comprising twenty-seven informants (mu...

in this study, we tried to examine the effectivences of advance organizer on boy students of high school 2nd grade in this experimental research design. our sample consisted of 184 second-grade high school students, including a control group and an expenimemal one, who were selected by using cluster sampling & randam mathing methods. a5.a pretest. a twenty-item test of geography, each of which ...