Search Results for: natural selection
Natural selection
Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More
Sexual selection
What is Sexual Selection? The definition of sexual selection is very interesting in biological terms. The sexual selection... 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
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
A Look Into Natural Selection and its Mechanisms
Charles Darwin is credited with outlining the fundamentals of evolution. He was a smart and eager pupil and protégé, and... Read More
Disruptive Selection
An evolutionary process known as disruptive selection (or disruptive natural selection) causes a population to become... Read More
Neutral mutation
Neutral Mutation Definition What is a neutral mutation? Neutral mutations are the alterations in the DNA that are... Read More
Darwinian fitness
Darwinian Fitness Definition Darwinian fitness refers to the measure of an individual organism's or genotype's reproductive... 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
Genetic diversity
Genetic Diversity Definition Each species is composed of individuals with their own set of genes. A gene is the inheritance... 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
On Mate Selection Evolution: Are intelligent males more attractive?
A study published in Science on January 11 seems to be the first to lay empirical evidence that concur with Charles Darwin's... 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
Genetics – Lesson Outline & Worksheets
Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics - Definition:... Read More
The Gene Pool and Population Genetics
Reviewed by: Mary Anne Clark, Ph.D. The previous tutorial is about adaptive radiation. Adaptive radiation is... Read More
Adaptive Radiation
Reviewed by: Mary Anne Clark, Ph.D. When Charles Darwin was in the Galapagos Islands, one of the first things he... 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
Selective Breeding
Reviewed by: Mary Anne Clark, PhD Thousands of years before Darwin proposed evolution by natural selection and... Read More
Sympatric speciation
Speciation is a process of evolution through which two different existing populations evolve and a distinct species form. It... Read More
Parasitism
Organisms depend on different sources of food to survive. Larger organisms like plants make their own food (autotrophs) and... Read More
Adaptive evolution
Definition noun A kind of evolution that involves evolutionary changes that are adaptive to a particular... Read More
Genetic variability
Genetic Variability Definition Genetic variability refers to the tendency of individual genetic characteristics in a... Read More
Sexual reproduction
Sexual reproduction is a mode of reproduction involving the fusion of haploid female gamete (egg cell) and haploid male... Read More
Pleiotropy
Pleiotropy Definition When one single gene starts affecting multiple traits of living organisms, this phenomenon is known... Read More
Genetics and Evolution
Tutorials in Genetics and Evolution immerse on the molecular aspects and the works of nature that led to what every living... Read More
The Evolutionary Development of Multicellular Organisms
The beginning of the Cambrian era saw a widespread arrival of multi-cellular organisms, particularly in the form of sponges.... 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
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Ecological niche
Ecological Niche Definition An ecological niche refers to the interrelationship of a species with all the biotic and... 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
