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Fasciation (pronounced / ˌ f æ ʃ i ˈ eɪ ʃ ə n /, from the Latin root meaning "band" or "stripe"), also known as cresting, is a relatively rare condition of abnormal growth in vascular plants in which the apical meristem (growing tip), which normally is concentrated around a single point and produces approximately cylindrical tissue ...
A crest is a point on a surface wave where the displacement of the medium is at a maximum. A trough is the opposite of a crest, so the minimum or lowest point of the wave. When the crests and troughs of two sine waves of equal amplitude and frequency intersect or collide, while being in phase with each other, the result is called constructive ...
Mitotic trigger waves are waves of Cyclin-dependent kinase 1 activity in cells that originate from pacemaker regions of the nucleus and propagate through the cytoplasm. [1]. Because trigger waves do not decrease in speed or amplitude during their propagation, they are more reliable at conveying molecular information across greater distances ...
One of the most common forms of biological oscillation is genetic oscillation, which can take place when a transcription factor binds and represses its own promoter.This type of regulatory system is able to successfully describe the NFkB-IkB and p53-Mdm52 biological oscillating systems.
Advanced Placement (AP) Biology (also known as AP Bio) is an Advanced Placement biology course and exam offered by the College Board in the United States. For the 2012–2013 school year, the College Board unveiled a new curriculum with a greater focus on "scientific practices".
To improve the images in Wikipedia's coverage of Biology articles. To encourage promising students to write, create, learn, and contribute volunteer efforts through a service learning project. The dreaded “Research Project” is a standard hurdle for most AP Programs.
The outcome is the rapid movement of the base of the wave up the swash slope and the disappearance of the wave crest. The front face and crest of the wave remain relatively smooth with little foam or bubbles, resulting in a very narrow surf zone, or no breaking waves at all. The short, sharp burst of wave energy means that the swash/backwash ...
This has led many to conclude that somitogenesis is coordinated by a "clock and wave" mechanism. More technically, this means that somitogenesis occurs due to the largely cell-autonomous oscillations of a network of genes and gene products which causes cells to oscillate between a permissive and a non-permissive state in a consistently timed ...