Search Results for: changes
Infradian rhythm
What is the Infradian Rhythm? An infradian rhythm is a type of biological rhythm that lasts longer than 24 hours, with a... Read More
Demographic transition
The demographic transition model is a theoretical framework that explains the historical shift in population dynamics as a... Read More
Natural selection
Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More
Physiological adaptation
If we look over evolutionary history, we find that it’s neither the most genius and intelligent nor the strongest and the... Read More
Generation of resting membrane potential
Stephen H. Wright Department of Physiology, College of Medicine, University of Arizona, Tucson, Arizona 85724... Read More
Silent mutation
A mutation is a change in the nucleotide sequence of a gene or a chromosome. When there is only one nucleotide involved, it... Read More
Adaptive evolution
Definition noun A kind of evolution that involves evolutionary changes that are adaptive to a particular... Read More
Induced fit model
Induced-Fit Model Definition The induced-fit model is a model for enzyme-substrate interaction to depict the dynamic... Read More
Hermaphrodite
We all know that typically living organisms are divided into two main categories of sex-based on their biological structure.... Read More
Genetic diversity
Genetic Diversity Definition Each species is composed of individuals with their own set of genes. A gene is the inheritance... Read More
Homeostasis
Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More
Differentiation
Differentiation in biology is the process where less specialized cells undergo changes to develop specialized structures and... 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
Degenerative disease
Degenerative Disease Definition A degenerative disease is defined as a disease characterized by the worsening condition due... Read More
Growth and Plant Hormones
Growth All living organisms begin in the same form: as a single cell. That cell will divide and the resulting cells will... Read More
Equilibrium
Equilibrium Definition In Biology Equilibrium refers to the state of balance and stability. In biology, equilibrium is... Read More
Animal Water Regulation
Homeostatic control, a set environment, and how evolution and natural selection drives a species to adapt to its environment... Read More
Feedback mechanism
Feedback Mechanism Definition What is a feedback mechanism? A feedback mechanism is a physiological regulation system in a... Read More
Genetic Mutations
Reviewed by: Mary Anne Clark, Ph.D. Genetic Mutations Genetic mutations are inherited variations in an... Read More
Nucleosome
Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... Read More
Global Carbon Cycling on a Heterogeneous Seafloor
Carbon, nitrogen and oxygen are the fundamental elements of life on Earth. Global carbon varies in amount and its... Read More
Frameshift mutation
Define Frameshift Mutation What is a frameshift mutation? In biology, insertions or deletions of nucleotides in the coding... Read More
Adaptation
Adaptation Definition In biology and ecology, adaptation refers to the process of adjusting behavior, physiology, or... 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
Regulation of Organic Metabolism, Growth and Energy Balance
Organic Metabolism Events of Absorptive and Post-absorptive States. The absorptive state is the period during which... Read More
Kidneys and Regulation of Water and Inorganic Ions
Renal Functions Kidneys remove/add substances from/to the plasma. Regulate water concentration, inorganic ion... Read More
Respiration
Organization of the Respiratory System Each lung is composed of air sacs called alveoli - the sites of gas exchange with... Read More
Sensory Systems
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal and... Read More
Depolarization
Depolarization is the removal of polarity by a process or action. It might also be used to describe how such activity leads... Read More
Movement of Molecules Across Cell Membranes
Diffusion Diffusion is essentially the movement of molecules from a region of higher concentration to a region of lower... Read More
Actions of Caffeine in the Brain with Special Reference to Factors That Contribute to Its Widespread Use
IV. Actions of Caffeine on Brain Functions and Behavior Having discussed the molecular and neuronal actions of caffeine,... 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
Carrier protein
Carrier protein is a type of cell membrane protein involved in facilitated diffusion and active transport of substances out... Read More