75 results found

Search Results for: shell

Shell

shell 1. A hard outside covering, as of a fruit or an animal. Specifically: The covering, or outside part, of a nut; as, a... Read More

Valence electron

What are valence electrons? Why are they significant? Valence electrons definition in chemistry: The electrons in an atom's... Read More

Diffusion shell

Diffusion shell a small vessel made of a semipermeable membrane through which peptone, but not serum albumin, can pass; used... Read More

Eggshell

Eggshell 1. The shell or exterior covering of an egg. Also used figuratively for anything resembling an eggshell. 2.... Read More

Top-shell

top-shell (Science: zoology) Any one of numerous species of marine top-shaped shells of the genus Thochus, or family... Read More

Nutshell

nutshell 1. The shell or hard external covering in which the kernel of a nut is inclosed. 2. Hence, a thing of little... Read More

Scallop

scallop 1. (Science: zoology) Any one of numerous species of marine bivalve mollusks of the genus pecten and allied genera... Read More

Actions of Caffeine in the Brain with Special Reference to Factors That Contribute to Its Widespread Use

IV. Actions of Caffeine on Brain Functions and Behavior Having discussed the molecular and neuronal actions of caffeine,... Read More

Wings

wing-shell (Science: zoology) Any one of various species of marine bivalve shells belonging to the genus avicula, in which... Read More

Test

Definition noun, plural: tests (1) An examination or evaluation. (2) (zoology) The external, protective shell, covering or... Read More

Kernel

Kernel 1. The essential part of a seed; all that is within the seed walls; the edible substance contained in the shell of a... Read More

Incisura

Definition noun, plural: incisurae A notch; an indent; a small hollow Supplement Incisura is a Latin word for incisure... Read More

Siphon

siphon 1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a... Read More

Microsphere

A spherical shell that is usually made of a biodegradable or resorbable plastic polymer, that has a very small diameter... Read More

Univalves

univalve (Science: zoology) A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as... Read More

Capsid

Capsid Definition A capsid is a three-dimensional proteinaceous capsular shell around a virus that encloses the viral... Read More

Oyster

oyster 1. (Science: marine biology, zoology) Any marine bivalve mollusk of the genus ostrea. They are usually found adhering... Read More

Carboxysome

Carboxysome is a protein-shell micro-compartment inside bacterial cell and is involved chiefly in carbon fixation. It is a... Read More

Glycocalyx

What is the Glycocalyx? The glycocalyx is a polysaccharide-based gel-like, highly hydrous cellular thin layer, covering... Read More

Ion

We have been introduced to ions in varied fields of Science like Physics, Chemistry, and Biology. This article takes you on... Read More

Melon

melon 1. (Science: botany) The juicy fruit of certain cucurbitaceous plants, as the muskmelon, watermelon, and citron melon;... Read More

Why Is The Mary River Turtle Endangered

The Mary River Turtle  (Elusor macrurus) has been named recently as one of the species on the brink of extinction. That is... 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

Neural Control Mechanisms

Nerve cells called neurons generate electric signals that pass from one end of the cell to another and release chemical... Read More

Arthropods

There are over two million species of arthropods, who initially arrived on Earth in the middle of the Cambrian period.... Read More

Coccidia

Coccidia (singular: coccidium) are sporozoans that live as parasites of the digestive tracts of certain animals. The... Read More

Reins

reins 1. The kidneys; also, the region of the kidneys; the loins. 2. The inward impulses; the affections and passions; so... Read More

Galea

Galea 1. (Science: botany) The upper lip or helmet-shaped part of a labiate flower. 2. (Science: surgery) a kind of bandage... Read More

Parasitism

Organisms depend on different sources of food to survive. Larger organisms like plants make their own food (autotrophs) and... Read More

Gyration

Gyration 1. The act of turning or whirling, as around a fixed center; a circular or spiral motion; motion about an axis;... Read More

Prokaryote

Prokaryote refers to any of the group of living organisms primarily characterized by the lack of a true nucleus and other... Read More

Hexamer

Definition noun, plural: hexamers (1) A molecule made up of six structural subunits, such as an oligomer (or polymer)... Read More

Mutualism

Mutualism Definition What is mutualism? In biology and ecology, a mutualism is a form of symbiosis that is characterized by... Read More

Lamellae

Definition noun, singular: lamella (general) Thin structures resembling a plate. (cell biology) Intergrana thylakoids, i.e.... Read More

Enterobius vermicularis

Definition noun Human pinworm that inhabits the rectum of its host Supplement Enterobius vermicularis (formerly Oxyurias... Read More

Symbiont

Definition noun, plural: symbionts An organism in a symbiotic relationship Supplement Symbiont is the term used to refer to... Read More

Zebra

zebra (Science: zoology) Either one of two species of south african wild horses remarkable for having the body white or... Read More

Organelle

The cell is regarded as the structural, functional, and biological unit of all organisms. It is a membrane-bound structure... Read More

Endomembrane system

Ever wondered how biomolecules are made within the cell and then they are released outside the cell for use by the body?... Read More

Protist

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