Search Results for: theory
Cell theory
What Is Cell Theory? Biological cell theory explains the idea of organismal constitution, structure, and function. It... Read More
Endosymbiotic theory
A eukaryotic cell is distinct from a prokaryotic cell by the presence of membrane-bound cellular structures called... Read More
Theory of Neuroscience
Nezih OKTAR Journal of Neurological Sciences (Turkish) 2006, Volume 23, Number 3, Page(s) 155-158. An Open Access... Read More
Young-helmholtz theory of colour vision
'''Young-helmholtz theory of color vision A theory that there are three perceiving elements in the retina: red, green, and... Read More
Hypothalamic theory
Definition noun A theory on emotion formulated by Walter Cannon in 1929 which states that the diencephalon, consisting of... Read More
Humoral theory
Definition noun An ancient Greek theory stating that the body is composed of four basic humors such as black bile, yellow... Read More
A New Theory on the Origin of Animal Multicellularity
Multicellular life, purportedly, started around 600 million years ago. From single-celled, certain organisms eventually... Read More
Demographic transition
The demographic transition model is a theoretical framework that explains the historical shift in population dynamics as a... Read More
Lamarckian theory
Definition noun An evolutionary theory holding that acquired or learned traits can be passed on from parents to... Read More
Recapitulation theory
Definition noun The theory formulated by E.H. Haeckel in which the individuals in their embryonic development pass through... Read More
Natural selection
Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... 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
Survival of the fittest
When we talk about evolutionary processes, the usage of the phrase "Survival of the fittest" has been very common in... Read More
![Biology n., [baɪˈɑlədʒi] Definition: scientific study of life](https://www.biologyonline.com/wp-content/uploads/2021/12/biology-definition-and-branches-of-biology-300x168.jpg)
Theory of electrolytic dissociation
theory of electrolytic dissociation --> Arrhenius doctrine The theory of electrolytic dissociation (1887) that became the... Read More
Chemiosmotic theory
Definition noun A theory postulated by the biochemist Peter Mitchell in 1961 to describe ATP synthesis by way of a proton... Read More
Kinetic molecular theory
Kinetic molecular theory (Science: chemistry) this theory assumes that molecules must collide in order to react. The more... Read More
Neutral mutation
Neutral Mutation Definition What is a neutral mutation? Neutral mutations are the alterations in the DNA that are... Read More
Embryology
Embryology Definition Embryology is a branch of biology that deals with the topics concerning gamete formation... Read More
Hypothesis
What Is Hypothesis? A scientific hypothesis is a foundational element of the scientific method. It's a testable statement... Read More
Prokaryotic Ancestor of Mitochondria: on the hunt
The alphaproteobacteria have been widely cited as the closest relative-- and possibly the prokaryotic ancestor -- of the... Read More
Knoops theory
Knoops theory That the catabolism of fatty acids occurs in stages in each of which there is a loss of two carbon atoms as a... Read More
Biogenesis
Biogenesis Definition Biogenesis refers to the idea or the process whereby a living thing comes from another living thing,... Read More
Metamerism
Metamerism Definition Metamerism is the repetition of homologous body segments. This type of development can be seen in the... Read More
Living things
Living Things Definition A living thing pertains to any organism or a life form that possesses or shows the characteristics... Read More
Spontaneous generation
Definition noun plural: spontaneous generations The previously popular notion that living organisms arise or develop from... Read More
Humoral immunity
Let’s get to know where one should place humoral immunity, the topic of today’s discussion!! By the end of the article,... Read More
Nervous System
THE is the most complicated and highly organized of the various systems which make up the human body. It is the... Read More
Sexual selection
What is Sexual Selection? The definition of sexual selection is very interesting in biological terms. The sexual selection... Read More
Punctuated equilibrium
Definition noun A theory that describes an evolutionary change happening rapidly and in brief geological events in between... Read More
Chemiosmosis
Chemiosmosis Definition What is chemiosmosis? In biology, chemiosmosis refers to the process of moving ions (e.g. protons)... Read More
Equilibrium
Equilibrium Definition In Biology Equilibrium refers to the state of balance and stability. In biology, equilibrium is... Read More
Degenerate
Degenerate means to become worse or less of its kind or former state. In biology, it means an entity performs the same... Read More
Darwin and Natural Selection
Reviewed by: Mary Anne Clark, Ph.D.In the 19th century, a man called Charles Darwin, a biologist from England,... Read More