50 results found

Search Results for: visible light

Light-dependent reaction

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

Chlorophyll

Why are most plants green? Have you ever had the same question? Perhaps, you’ve been told that the plants are green... Read More

Plant Metabolism

Introduction Plants are responsible for incredible feats of molecular transformation. The processes are always being... Read More

Visible light

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

Photolysis

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

Light energy

Definition noun A form of energy consisting of particle-like photons with wavelike properties, and in which affects the... Read More

Sunlight

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

Light

Definition noun (1) (physics) The electromagnetic radiation of any wavelength, or sometimes only referring to a range of... 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

Electromagnetic spectrum

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

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

Wavelength

wavelength (Science: radiobiology) The length of a single cycle of a wave, usually measured from crest-to-crest. For... Read More

Tapetum lucidum

Definition noun, plural: tapeta lucida A layer of tissue in the choroid or in the retinal pigment epithelium of the eye of... Read More

Natural selection

Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More

Photon

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

Young-helmholtz theory of colour vision

'''Young-helmholtz theory of color vision A theory that there are three perceiving elements in the retina: red, green, and... Read More

Tapetum

Definition noun, plural: tapeta (botany) A layer of nutritive cells within the sporangium, providing nutrition for growing... Read More

Chlorophyll d

Definition noun A type of chlorophyll found in marine red algae and cyanobacteria, and absorbs the infrared light of the... Read More

Ultraviolet ray

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

Invisible spectrum

Invisible spectrum The radiation lying on either side of visible light, i.e., infrared and ultraviolet... Read More

Soils

Where a plant grows and what resources are available to it is of vital importance to the life of a plant. The soil type and... Read More

Gamma ray

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

Labia

Labia Definition Often, when persons think of the female reproductive system, they think of the vagina. However, the female... Read More

Prophase

Prophase is the first stage of mitosis; the very first step in this crucial process of the M-phase of the cell cycle. Now as... 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

Vascular plants

Definition of Vascular plants The term 'vascular' is derived from the Latin word vāsculum, vās, meaning "a container and... Read More

Infrared

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

Microwave

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

Redox reaction

Redox Reaction Definition What are redox reactions? This is a common term in chemistry and biology. In chemistry, a redox... Read More

Stems

External Form of a Woody Twig A woody twig, or stem, is an axis with leaves attached. The leaves are arranged in various... 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

Obscure

obscure 1. Covered over, shaded, or darkened; destitute of light; imperfectly illuminated; dusky; dim. His lamp shall be put... Read More

Incomplete dominance

Incomplete Dominance Definition After Gregor Mendel discovered inheritance laws, the term ''incomplete dominance'' was... Read More

Leukocyte

Definition noun, plural: leukocytes Any of the nucleated blood cells that lack hemoglobin, and whose main function involves... Read More

Polytene chromosome

polytene chromosome (Science: cell biology) giant chromosomes produced by the successive replication of homologous pairs of... Read More

Nervous System

    THE is the most complicated and highly organized of the various systems which make up the human body. It is the... Read More

Basal lamina

Definition noun (histology) A layer of extracellular matrix found on the basal surface of epithelial cells, and which is... Read More

Muscular system

Muscular System Definition What is the muscular system? The muscular system is a system that includes muscle cells and... Read More