Search Results for: existence
Cryptozoology – The evidence of creatures whose existence is uncertain
The evidence of creatures whose existence is uncertain is studied by cryptozoology, a science researching presumable proof... 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
Angiosperm
Angiosperms Definition What is an angiosperm? An angiosperm is a plant that produces flowers. The angiosperms, also... Read More
Realized niche
What is a niche? A niche can be defined as the means by which a species or an individual interacts with its environment. In... Read More
Aerotolerant
Aerotolerant Definition The term "aerotolerant" pertains to an organism that does not require oxygen for growth but can... Read More
Pleiotropy
Pleiotropy Definition When one single gene starts affecting multiple traits of living organisms, this phenomenon is known... 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
Mutualistic symbiosis
Mutualistic Symbiosis Definition In order to understand what a mutualistic symbiotic relationship means, we will break down... 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
Examples of Natural Selection
Reviewed by: Mary Anne Clark, Ph.D. Darwin's Finches Darwin's finches are an excellent example of the way in... Read More
Ecosystem diversity
Ecosystem Diversity Definition What is ecosystem diversity? Ecosystem diversity deals with the study of different... Read More
SENI Biometric Analysis on the extinct Scincidae species: Macroscincus coctei (underlined)
Brian L. Schnirel Leeway Corucia Research Center (LCRC) Courtesy: Polyphemos (2004) Introduction: It has been... Read More
Biocoenosis
Definition noun, plural: biocoenoses All the interacting organisms that live together in a specific habitat or biotope,... Read More
Selectively-permeable membrane
Selectively Permeable Membrane Definition We can define selectively permeable membranes as those that are selectively... Read More
Homo sapiens
Definition noun The species group of bipedal hominins characterized by having higher and vertical forehead, brain volume of... Read More
Inhibitory postsynaptic potential
Inhibitory Postsynaptic Potential Definition An inhibitory postsynaptic potential is a type of synaptic potential. It is... Read More
Redox reaction
Redox Reaction Definition What are redox reactions? This is a common term in chemistry and biology. In chemistry, a redox... Read More
Ecological niche
Ecological Niche Definition An ecological niche refers to the interrelationship of a species with all the biotic and... Read More
Polymorphism
Polymorphism Definition The occurrence of two or more different forms or morphs in the population of a species is referred... 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
Incomplete dominance
Incomplete Dominance Definition After Gregor Mendel discovered inheritance laws, the term ''incomplete dominance'' was... Read More
Density dependent factor
Density-dependent factors are the limiting factors of an ecosystem that regulate population growth in a density-dependent... Read More
Osteichthyes
Definition noun A taxonomic superclass of a diverse group of fish that have skeletons composed primarily of bone... Read More
Book lungs
Book Lungs Definition Lungs are known as the organs that help organisms breathe. When we think of lungs, we think of the... Read More
Non-living thing
Non-living Thing Definition A non-living thing in biology means any form without a life, such as an inanimate body or... Read More
Between Necessity and Probability: Searching for the Definition and Origin of Life (Advances in Astrobiology and Biogeophysics)
Between Necessity and Probability: Searching for the Definition and Origin of Life (Advances in Astrobiology and... Read More
RNA-DNA World Hypothesis?
How did life start as we know it? In the scientific community, the "RNA World Hypothesis" has many adherents. Many believed... Read More
First time! Human blood cell turned into a young sex cell
In essence, our body consists of two major types of cells – one group involved directly in reproducing sexually (called... Read More
The interstitium – a new biological organ?
Scientists found, apparently by accident, a new biological organ and they want it called "interstitium". The discovery was... Read More
Biological Viruses
The prime directive of all organisms is to reproduce and survive and this also applies to viruses. Apparently, viruses are... Read More
Pollution in Freshwater Ecosystems
As with all ecosystems, the existence and operations of human society inevitably have an effect on the way of life in a... Read More
Abiotic Factors – Water Conditions
Evidently, the light and heat from the sun play an important role in providing suitable conditions. However, the water... Read More