Search Results for: progression
Centrosome
Centrosome Definition What is a centrosome? The centrosome is considered to be the main microtubule-organizing... Read More
Allopatric speciation
We can define speciation as a process by which the novel genetically independent group of organisms are formed through the... Read More
Cell adhesion
Cell Adhesion Definition Cell adhesion is the process in which a cell uses a specialized complex of proteins to get... Read More
Addressing the Unmet Medical Need for Safe and Effective Weight Loss Therapies
Perspective Addressing the Unmet Medical Need for Safe and Effective Weight Loss Therapies Cynthia M. Arbeeny Address... Read More
Neutral theory of molecular evolution
Definition noun A theory stating that evolutionary changes particularly at the molecular level arise from genetic drift of... Read More
Decerebrate rigidity
Definition noun An involuntary posturing whereby the arms are extended on the sides while the head is arched back, as... Read More
Adaptive evolution
Definition noun A kind of evolution that involves evolutionary changes that are adaptive to a particular... Read More
Primary succession
Primary Succession Definition Primary succession is an ecological succession where a newly formed area is inhabited for the... Read More
Glycocalyx
What is the Glycocalyx? The glycocalyx is a polysaccharide-based gel-like, highly hydrous cellular thin layer, covering... Read More
Microtubule organizing center
Definition noun A structure inside the cell from where microtubules organize following depolymerization to turn into tubular... Read More
Prophase I
Organisms all use mitosis to create more cells in the body. Meiosis, a similar process, is used in some organisms to undergo... Read More
Evolutionary biology
Definition noun The branch of biology concerned with the evolution of organisms, particularly the origin and descent of... Read More
The Evolution of Cell Organelles
The previous tutorial page noted the emergence of protists, organisms that possessed a distinct cell nucleus and contained... Read More
Autocrine signaling
Autocrine Signaling Definition What is autocrine signaling? Autocrine signaling is a type of cell signaling wherein a cell... Read More
Recombination DNA repair
Recombination DNA Repair Definition Recombination DNA repair is a biological reparative process in response to DNA damage... Read More
Inherited traits
What are Inherited Traits? The characteristics or traits that are passed from parents to offspring are known as inherited... Read More
Semilunar valve
The human heart structure consists of heart chambers (2 atria and 2 ventricles) that differ functionally from each other.... Read More
Proteoglycan
What are proteoglycans? Proteoglycans are primarily a type of polysaccharide. Structurally, proteoglycans are... Read More
Hemostasis
Definition noun, plural: hemostases The process of stopping or arresting bleeding or keeping the blood within the damaged... Read More
Exponential growth
Definition noun A growth in which the rate is proportional to the increasing number or size in an exponential (rather than... Read More
Incubation period
Incubation Period Definition The incubation period is the time duration between exposure to the pathogen and the appearance... Read More
Fragmentation
Fragmentation Definition What is fragmentation? In general, fragmentation refers to the state or the process of breaking... Read More
Y chromosome
Y chromosome Definition The Y chromosome constitutes one member of the pair of sex chromosomes within an organism, a common... Read More
Parenchyma
Parenchyma Definition What does parenchyma mean? Let's define the word "parenchyma". Most of the functional tissues in... Read More
Natural selection
Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More
Chromatids
Chromatid Definition Chromatids are found inside our cells. Chromatids are condensed chromosomes distinguishable during... Read More
Cross-linking
Cross-linking Definition Cross-linking, in general, means the forming of cross-links between the joining structures. In... Read More