34 results found

Search Results for: stream

Transpiration Stream

Pertaining to the flow of water across a plant, beginning with the uptake of water via the roots to the point where the... 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

Plant Water Regulation

A plant requires water as an essential ingredient of photolysis, the photochemical stage of photosynthesis where water is... Read More

Instream cover

Instream cover areas of shelter in a stream channel that provide aquatic organisms protection from predators or competitors... Read More

Bloodstream

Definition noun The blood flowing through a circulatory system of an animal, carrying substances from one tissue to... Read More

The Water Cycle

The water cycle (sometimes referred to as the hydrological cycle) is the continuous transfer of water from air, sea land and... Read More

Pollution in Freshwater Ecosystems

As with all ecosystems, the existence and operations of human society inevitably have an effect on the way of life in a... Read More

Substrate

Substrate Definition What is a "substrate"? The underlying substances or layers are termed as substrate. The definitions of... Read More

Neutrophil

Definition noun, plural: neutrophils A type of polymorphonuclear leukocyte characterized by having multilobed nucleus,... Read More

Surface water

Definition noun (ecology) Water that is above the substrate or soil surface such as streams, bays, lakes, rivers, seas,... Read More

Rheotaxis

Definition noun A form of taxis characterized by the directional movement of an organism in response to a current of water... Read More

Peptide hormone

'''peptide hormone peptide hormones are a class of peptides that are secreted into the blood stream and have endocrine... Read More

Loose associations

Definition of Loose Associations When asked to define loose associations in psychology one can tell that it is a formal... Read More

Oxidizer

An oxidizer is a substance that facilitates oxidation in a chemical reaction by accepting electrons from another substance.... 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

Running Water Freshwater Communities

Running water freshwater communities are also known as lotic communities, lotic meaning running water. Lotic communities are... Read More

Lotic Communities & Animals

A running water environment offers numerous microhabitats that simulate favorable conditions for many types of animals to... Read More

Buffer

Definition noun, plural: buffers (1) (chemistry) A buffer solution : a solution containing either a weak acid and a... Read More

Generation of resting membrane potential

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

Metastasis

metastasis 1. (Science: cell biology, oncology) The transfer of disease from one organ or part to another not directly... Read More

Thrombosis

Definition noun, plural: thromboses Thrombus (blood clot) that forms in any part of the circulatory system, causing... Read More

Macrophytes

Introduction    Examples of Macrophytes. (Source: Canada's AquaticEnvironments) ... Read More

Labyrinth

Labyrinth 1. An edifice or place full of intricate passageways which render it difficult to find the way from the interior... Read More

Spin

spin 1. To practice spinning; to work at drawing and twisting threads; to make yarn or thread from fibre; as, the woman... Read More

Feeder

Feeder 1. One who, or that which, gives food or supplies nourishment; steward. A couple of friends, his chaplain and feeder.... Read More

Contamination

Contamination Definition Contamination, sometimes interchanged with pollution, is the existence of live things or... Read More

Gills

Gill a woody glen; a narrow valley containing a stream. Origin: Icel. Gil. 1. (Science: anatomy) An organ for aquatic... Read More

Radiation

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

Anchor

Anchor 1. A iron instrument which is attached to a ship by a cable (rope or chain), and which, being cast overboard, lays... Read More

Blast

Blast 1. (Science: biology, suffix) a suffix or terminal formative, used principally in biological terms, and signifying... Read More

Ecosystem

Ecosystem Definition An ecosystem is a system consisting of biotic and abiotic components that function together as a unit.... 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

Foot

Foot 1. (Science: anatomy) The terminal part of the leg of man or an animal; especially, the part below the ankle or wrist;... Read More

Overbank flooding

overbank flooding (Science: ecology) Any situation in which inundation occurs as a result of the water level of a river or... Read More