40 results found

Search Results for: air pressure

Air pressure

Definition noun (1) The pressure caused by the weight of air. (2) The force exerted by air per unit area. Supplement Air... Read More

Respiration

Organization of the Respiratory System Each lung is composed of air sacs called alveoli - the sites of gas exchange with... Read More

Water in Plants

The movement of molecules, specifically water and any solutes, is vital to understand in light of plant processes. This will... Read More

Hydrogen

Hydrogen is one of the chemical elements found in nature. A chemical element refers to the pure substance of one type of... Read More

Carbon dioxide

Carbon Dioxide Definition noun, car·bon di·ox·ide, /daɪˈɒksaɪd/ (biochemistry) An inorganic compound, with the... Read More

Steam

steam 1. To emit steam or vapor. My brother's ghost hangs hovering there, O'er his warm blood, that steams into the air.... Read More

Environment

Environment Definition What does environment mean? If you mean physical environment, then it is defined as the surrounding... Read More

Permeability

Permeability Definition What is permeability? In earth science, its definition is this: "the ability of any material such... Read More

Atmospheric

Atmospheric --> atmospherical 1. Of or pertaining to the atmosphere; of the nature of, or resembling, the atmosphere; as,... Read More

Arthropod

Arthropod Definition What is an arthropod? An arthropod is an invertebrate living organism characterized by the presence of... Read More

Oxygen

Oxygen Definition In biochemistry, oxygen is the colorless, odorless, gaseous element represented by the symbol "O", with... 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

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

Plant Water Regulation

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

Plant Tissues

Plants are composed of three major organ groups: roots, stems, and leaves. As we know from other areas of biology, these... Read More

Receiver

receiver 1. One who takes or receives in any manner. 2. A person appointed, ordinarily by a court, to receive, and hold in... Read More

Gas

Gas Origin: Invented by the chemist van Helmont of brussels, who died in 1644. 1. An aeriform fluid; a term used at first by... Read More

Effect of Chemicals on Growth & Development in Organisms

Plants Plants require a large number of elements to function properly, mainly carbon, oxygen, and hydrogen, essentially... Read More

Safety

safety 1. The condition or state of being safe; freedom from danger or hazard; exemption from hurt, injury, or loss. Up led... Read More

Hemisphere

Hemisphere 1. A half sphere; one half of a sphere or globe, when divided by a plane passing through its center. 2. Half of... Read More

Mill

mill 1. A machine for grinding or commuting any substance, as grain, by rubbing and crushing it between two hard, rough, or... Read More

Engine

Engine 1. (pronounced, in this sense,) natural capacity; ability; skill. A man hath sapiences three, memory, engine, and... Read More

Triple

triple 1. Consisting of three united; multiplied by three; threefold; as, a triple knot; a triple tie. By thy triple shape... Read More

Brake

Brake 1. (Science: botany) a fern of the genus Pteris, especially. The P. Aquilina, common in almost all countries. It has... Read More

Liquids

Liquid 1. A substance whose parts change their relative position on the slightest pressure, and therefore retain no definite... Read More

Voice

voice 1. Sound uttered by the mouth, especially that uttered by human beings in speech or song; sound thus uttered... Read More

Eubacteria

Eubacteria are prokaryotic microorganisms consisting of a single cell lacking a nucleus and containing DNA is a single... Read More

Suck

suck 1. To draw, as a liquid, by the action of the mouth and tongue, which tends to produce a vacuum, and causes the liquid... Read More

Insects

To learn more about arthropods, look at the previous tutorial. The Class Insecta of the Arthropoda Phylum is by far the... Read More

Animal Water Regulation

Homeostatic control, a set environment, and how evolution and natural selection drives a species to adapt to its environment... Read More

Influence

Influence To control or move by power, physical or moral; to affect by gentle action; to exert an influence upon; to modify,... Read More

Gauge

Gauge 1. A measure; a standard of measure; an instrument to determine dimensions, distance, or capacity; a standard. This... 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

Hair

Hair 1. The collection or mass of filaments growing from the skin of an animal, and forming a covering for a part of the... Read More

Fluid

Fluid Having particles which easily move and change their relative position without a separation of the mass, and which... Read More

Water

Water Definition (1) (biochemistry) A chemical substance, with chemical formula H2O, that is a clear, colorless, odorless,... Read More

Egestion

Egestion is the act or process of voiding or discharging undigested food as faeces. To egest means to discharge undigested... Read More

Ambient

Ambient (Science: ecology) describes the surrounding environment (especially temperature and pressure) of an object or... Read More

Protist

Protist Definition What is a protist? All protists are eukaryotes, i.e. organisms with a nucleus. However, they are... Read More