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Segmentation in biology is the division of some animal and plant body plans into a linear series of repetitive segments that may or may not be interconnected to each other. This article focuses on the segmentation of animal body plans, specifically using the examples of the taxa Arthropoda , Chordata , and Annelida .
A segmentation gene is a gene involved in the early developmental stages of pattern formation. It regulates how cells are organized and defines repeated units in the embryo . Segmentation genes have been documented in three taxa: arthropods (i.e. insects and crabs ), [ 2 ] chordates (i.e. mammals and fish ), and annelids (i.e. leeches and ...
The gooseberry gene's role in segmentation was believed to be involved in segment-polarity class of segmentation genes required for the formation of larval segments because, during embryogenesis, half of the larval segments are replaced by the remain half segment, but in a reversed polarity, which suggested that gooseberry was a single gene. [8]
Segmental analysis is a method of anatomical analysis for describing the connective morphology of the human body.Instead of describing anatomy in terms of spatial relativity, as in the anatomical position method, segmental analysis describes anatomy in terms of which organs, tissues, etc. connect to each other, and the characteristics of those connections.
The nervous system segmentation confers several developmental advantages to the vertebrate body as humans possess a body plan that is bilaterally segmented at the nervous system level. The segmentation is involved at all levels of the human nervous system with increasing level of complexity in the innervation from the brain to limbs. [1]
A research design that involves multiple measures of the same variable taken on the same or matched subjects either under different conditions or over two or more time periods. [ 1 ] Paired t-test , Wilcoxon signed-rank test
There are two approaches to segmenting a market – a discovery approach or an analytic approach. Each approach is appropriate to the type of business and market they are approaching. [10] An analytic approach is a much more research and data based approach, where two sets of information are derived and used to segment the market. [9]
Technographic segmentation was developed to measure and categorize consumers based on their ownership, use patterns, and attitudes toward information, communication and entertainment technologies. The concept and technique was first introduced in 1985 by Dr. Edward Forrest [ 1 ] in a study of VCR users.