108 results found

Search Results for: radiation

Electromagnetic radiation

Definition noun The radiation that consists of associated, interacting electric and magnetic field waves traveling at the... Read More

Ultraviolet radiation

Definition noun A form of electromagnetic radiation emitting ultraviolet rays Supplement The electromagnetic 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

Adaptive radiation

Definition noun The diversification of several new species from a recent ancestral source, each adapted to utilize or... Read More

Radiation

radiation (Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic... Read More

Irradiation

Irradiation treatment by ionising radiation, such as x-rays or radioactive sources such as radioactive iodine seeds. See:... Read More

Radiation biophysics

Radiation biophysics The study of the effects of radiation on cells, tissues, biomolecules, and living... Read More

Sunlight

Definition noun The electromagnetic radiation of the sun that reaches the earth, particularly infrared, visible light, and... Read More

Electromagnetic spectrum

Definition noun The spectrum of all types of electromagnetic radiation Supplement The electromagnetic spectrum includes... Read More

Genetics – Lesson Outline & Worksheets

  Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics - Definition:... Read More

Microwave

Definition noun A form of electromagnetic radiation that is generally characterized by wavelengths ranging from one meter to... Read More

Pioneer species

You might have come across news of some barren lands turning into luscious grasslands or forests after decades? Or you might... Read More

Infrared

Definition noun A form of electromagnetic radiation with wavelengths ranging between 770 nm and 1000 nm Supplement The... Read More

Gamma ray

Definition noun, plural: gamma rays Very powerful and penetrating, high-energy electromagnetic radiation of shorter... Read More

Visible light

Definition noun The electromagnetic radiation with wavelengths between 400 nm and 750 nm and can produce a visual... Read More

Ultraviolet ray

Definition noun, plural: ultraviolet rays A ray characterized generally by a wavelength between 10 nm to about 400... 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

Benign

Benign Definition How to define benign? The meaning of benign in a general sense is "beneficial" and "pleasant". Benign is... Read More

Divergent evolution

Divergent Evolution Definition Divergent evolution refers to the process by which interbreeding species diverged into two... Read More

X-ray

Definition noun, plural: X-rays (1) A ray characterized generally by its wavelength ranging from 0.01 to 10 nm, and... Read More

Convergent evolution

Convergent evolution definition What is convergent evolution? Convergent evolution is a concept in evolutionary biology... Read More

Denaturation

Denaturation Definition In biochemistry, denaturation is defined as a process in which a molecular structure deviates from... 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

Physical Development in Humans

The Newly Born Child Depending on the nutrients available to the child within pregnancy and the genetic makeup of the... Read More

Photon

Definition noun, plural: photons (physics) A quantum unit of light energy or electromagnetic radiation Supplement A photon... 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

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

Synergistic effect

Synergistic Effects Definition In biology, synergistic effects are the effects when chemical substances or biological... Read More

Genome

Genome Definition What is a genome? As defined in biology, a genome is a complete set of deoxyribonucleic acid (DNA) within... Read More

Absorption Spectrum

The spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain... Read More

Disinfectant

Disinfectant An agent that disinfects, applied particularly to agents used on inanimate objects. Compare: antiseptic. An... Read More

Barophile

Definition noun, plural: barophiles An organism that grows in high-pressure environments Supplement A barophile is an... Read More

Biophoton

Definition noun, plural: biophotons A low-energy photon that is released by a biological system Supplement A photon is the... Read More

Photolysis

Photolysis Definition We define photolysis as a chemical process in which chemical compounds or molecules are split into... Read More

Adaptive zone

Definition noun, plural: adaptive zones An ecological opportunity for the development of adaptive radiation, enabling a... Read More

Reactive oxygen species

Definition noun Chemically reactive molecules and ions of oxygen with an unpaired electron Supplement Reactive oxygen... Read More

Primary productivity

Planet Earth is home to different types of life forms ranging from microscopic bacteria to giant whales and elephants. To... Read More

Radiodensity

Definition noun The state or quality of being radiodense, i.e. dense to X-rays or other radiation Supplement In radiography,... 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

Light-dependent reaction

Many organisms, such as green plants, convert light energy into chemical energy through the mechanism of photosynthesis. In... Read More