152 results found

Search Results for: influence

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

Y chromosome

Y chromosome Definition The Y chromosome constitutes one member of the pair of sex chromosomes within an organism, a common... Read More

Genetic drift

Genetic Drift Definition What is genetic drift in simple terms? The simple definition of genetic drift ( also referred to... Read More

Apparent competition

Competition Definition One of the many branches of biology is ecology. Ecology is the study of the relationships that the... Read More

Differentiation

Differentiation in biology is the process where less specialized cells undergo changes to develop specialized structures and... Read More

Ascendant

Ascendant 1. Ascent; height; elevation. Sciences that were then in their highest ascendant. (Temple) 2. (Science: astronomy)... Read More

The Psychobiology of Hysteria

Editorial Hysteria is often regarded as the archetypal psychodynamic illness. Freud carried out much of his early work on... Read More

Induce

Induce 1. To lead in; to introduce. The poet may be seen inducing his personages in the first Iliad. (Pope) 2. To draw on;... Read More

Epoch

Epoch 1. A fixed point of time, established in history by the occurrence of some grand or remarkable event; a point of time... Read More

Symbiosis

Symbiosis Definition What is symbiosis? Symbiosis can be defined as any kind of relationship or interaction between two... Read More

Osteon

What is an Osteon? In osteology (the study of bony structures and skeleton), the osteons (or Haversian systems) are the... Read More

Density dependent limiting factor

What Is A Density-Dependent Limiting Factor? Density-dependent limiting factors are limiting factors, which, depending on... Read More

Weight

weight 1. The quality of being heavy; that property of bodies by which they tend toward the center of the earth; the effect... Read More

Generation of resting membrane potential

Stephen H. Wright Department of Physiology, College of Medicine, University of Arizona, Tucson, Arizona 85724... Read More

An introduction to Homeostasis

Researched and Written by Jonjo Minns Submitted to biologyonline.com on February 25, 2009. Published in biologyonline.com... Read More

Phenotype

Phenotype refers to the observable characteristics of an organism as a multifactorial consequence of genetic traits and... Read More

Atom

In the enchanting tapestry of life, the smallest of heroes and a celestial protagonist emerges—'the atom'. With grace and... Read More

Impulse

Impulse 1. The act of impelling, or driving onward with sudden force; impulsion; especially, force so communicated as to... Read More

Dominant species

Dominance is the state of being supreme or dominant. Community dominance refers to the form of dominance where certain... Read More

Adipose tissue

Adipose Tissue Definition Adipose tissue, a specialized variety of connective tissue, is composed of lipid-rich cells known... Read More

Dominant

Dominant Definition The word dominant or dominant trait is commonly used in biology. The general meaning of dominant is to... Read More

Hypothalamus

Definition noun, plural: hypothalami A small region of the forebrain comprised of several small nuclei, located between the... Read More

Independent Assortment

Independent Assortment Definition Independent assortment refers to the alleles or genes that sort into the newly formed... Read More

Centrosome

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

Endocrine gland

Definition noun, plural: endocrine glands Any of the ductless glands secreting hormones that are released directly into... Read More

Epistasis

Epistasis Definition What is epistasis in genetics? How does epistasis occur? The epistasis definition, in biology, refers... Read More

Polygenic trait

Polygenic Trait Definition Polygenic trait refers to a trait that is controlled by multiple non-allelic genes. These genes... Read More

Nucleosome

Nucleosome Definition Every organism is made of deoxyribonucleic acid, also known as DNA. DNA is made up of numerous... 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

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

Law of Segregation

Mendel’s Laws of Inheritance The father of genetics, Gregor Mendel, reported his findings in 1860 that initially were... Read More

Krebs cycle

Krebs cycle, also known as the citric acid cycle or tricarboxylic acid (TCA) cycle, is a fundamental metabolic pathway that... Read More

Chondroblast

There are two forms of cells in cartilage: chondroblasts and chondrocytes. The chondroblasts are cells that secrete the... Read More

Neural Control Mechanisms

Nerve cells called neurons generate electric signals that pass from one end of the cell to another and release chemical... Read More

The FIFTH MIRACLE: The Search for the Origin and Meaning of Life

 The FIFTH MIRACLE: The Search for the Origin and Meaning of Life    ... Read More

Blood Vessels Hold Key To Thicker Hair Growth

MGH researchers have succeeded in growing hair faster and thicker in mice, thanks to a protein that promotes blood vessel... Read More

Milk yields affected by music tempo

Dairy cows produce more milk when listening to REM's 'Everybody Hurts' or Beethoven's 'Pastoral Symphony' than when... Read More

System

A system pertains to interdependent or interrelated objects comprising and functioning as a whole. In biology, it may refer... Read More

Jaw

Jaw 1. (Science: anatomy) One of the bones, usually bearing teeth, which form the framework of the mouth. Hence, also, the... Read More

Breathing

Breathing 1. Respiration; the act of inhaling and exhaling air. Subject to a difficulty of breathing. (Melmoth) 2. Air in... Read More