70 results found

Search Results for: stability

Stability

stability The quality of maintaining a constant character in the presence of forces which threaten to disturb it, resistance... Read More

Positive feedback

Positive Feedback Definition Each mechanism of the body like temperature, blood pressure, and levels of specific nutrients... Read More

A new wrinkle in evolution — Man-made proteins

Nature, through the trial and error of evolution, has discovered a vast diversity of life from what can only presumed to... Read More

Condyloid joint

A joint is a point where two bones are attached and are capable of movement. The joints not only provide the movements of... Read More

Community (biology)

Community, in biology, refers to the assemblage of interacting organisms (either of the same or different species)... Read More

Microtubule-associated protein

Definition noun, plural: microtubule-associated proteins Any of the proteins bound to the tubulin subunits of the... Read More

Homeostatic equilibrium

Definition noun (1) The tendency of an organism or a cell to regulate its internal conditions, usually by a system of... Read More

Centrosome

Centrosome Definition What is a centrosome? The centrosome is considered to be the main microtubule-organizing... Read More

Redundancy Hypothesis

Definition noun A theory that assumes one or more species impart a role within an ecological unit to maintain dynamic... Read More

Hydrophilic

Hydrophilic Definition What does a hydrophile (or hydrophilic molecule) mean? If a molecule is “water-loving”, it is... Read More

Polypeptide

Polypeptide Definition Biology What are polypeptides? A polypeptide is defined as a polymer of amino acids joined together... Read More

Arboreal

Arboreal Definition Arbor is a Latin word meaning "tree". Thus, arboreal means "related to or pertaining to trees". The... Read More

Light-independent reaction

The process of photosynthesis is a biological procedure in which plants produce oxygen and energy (sugar) by using light... Read More

Epidermis

Epidermis Definition What is the epidermis? We can define the epidermis as one or more layers of cells forming the tough... Read More

Ecosystem diversity

Ecosystem Diversity Definition What is ecosystem diversity? Ecosystem diversity deals with the study of different... Read More

Sarcolemma

Sarcolemma Definition What is the sarcolemma? It is the thin, transparent, extensible plasma membrane of the muscle cell.... Read More

Anchor

Anchor 1. A iron instrument which is attached to a ship by a cable (rope or chain), and which, being cast overboard, lays... Read More

Ecosystem

Ecosystem Definition An ecosystem is a system consisting of biotic and abiotic components that function together as a unit.... Read More

Antagonistic Muscle

Definition of Antagonistic Muscle What does the term “antagonistic” mean? As the name suggests, the word antagonistic... Read More

Population Growth and Survivorship

By: Maria Victoria Gonzaga Previously, we learned about biodiversity and endemism. Now, let's look at the... Read More

Trophic level

In ecology, a trophic level pertains to a position in a food chain or ecological pyramid occupied by a group of organisms... Read More

Milieu interieur

Definition noun (1) Literally means: the environment within. (2) The outside of the cells inside the body of an organism,... Read More

Deoxyribonucleic acid

Deoxyribonucleic Acid (DNA) Definition A nucleic acid refers to any of the group of complex compounds made up of linear... Read More

Feedback mechanism

Feedback Mechanism Definition What is a feedback mechanism? A feedback mechanism is a physiological regulation system in a... Read More

Disulfide bond

Definition noun (chemistry) (1) The single covalent bond formed from the coupling of thiol groups, especially of cysteine... Read More

Middle lamella

Definition noun plural: middle lamellae ˈmɪdəl ləˈmɛl.ə A pectin-rich intercellular material that glues the... 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

Ecological succession

Definition noun (ecology) The progressive succession of a community or group of species in an ecosystem over... Read More

Transfer ribonucleic acid

Definition noun plural: transfer ribonucleic acids trans•fer ri•bo•nu•cle•ic ac•id, ˈtɹænsfɝ... Read More

Glycolipid

Definition noun, plural: glycolipids A carbohydrate, usually an oligosaccharide, that is covalently linked to a lipid... Read More

Thymidine monophosphate

Definition noun plural: thymidine monophosphates (biochemistry) A nucleotide composed of thymine, deoxyribose and a... Read More

Thymidine diphosphate

Definition noun plural: thymidine diphosphates (biochemistry) A nucleotide composed of thymine, deoxyribose and two... Read More

Thymidine triphosphate

Definition noun plural: thymidine triphosphates (biochemistry) A nucleotide composed of thymine, deoxyribose and three... Read More

Uridine monophosphate

Definition noun plural: uridine monophosphates (biochemistry) A nucleotide composed of uracil, ribose and a phosphate... Read More

Sphingolipid

Definition noun plural: sphingolipids sphin·go·lip·id A type of lipid with a sphingoid base (e.g. sphingosine and... Read More

Roots

Upon seed germination, the embryo root, called the radicle, grows and develops into the first root. The radicle may thicken... Read More

Genetic Control – On and Off Genes

Reviewed by: Mary Anne Clark, Ph.D. This lesson looks at the various factors involved that affect growth and... Read More

Recombination DNA repair

Recombination DNA Repair Definition Recombination DNA repair is a biological reparative process in response to DNA damage... Read More

Community Patterns

By: Maria Victoria Gonzaga In the previous lesson, we learned what a population is, its attributes, and processes... Read More

Nucleobase

Definition noun plural: nucleobases (biochemistry) The base in the nucleic acid, e.g. purines and pyrimidines Details ... Read More