tusk-shell
(Science: zoology) See tusk.
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shellac - resin obtained from scale insects used to make varnish by combining with alcohol
shrub - woody plant with branches from the base and not reaching any great size (Glossary of PM)
sickle-shaped - crescent shaped ...
shell
Any hard outer covering, such as the carapace of turtles and tortoises, the exoskeleton of crustaceans, the calcareous plates of echinoderms, the outermost membranes of an egg, the skeleton of Forminifera, ...
Hard shell eggs: While reptiles were the first to have eggs that could survive on land, birds gained an advantage when they developed eggs that had a hard shell.
[edit] Shell
Bird eggshells are diverse. For example:
cormorant eggs are rough and chalky
tinamou eggs are shiny
duck eggs are oily and waterproof
cassowary eggs are heavily pitted ...
valence shell
The outermost energy shell of an atom, containing the valence electrons involved in the chemical reactions of that atom.
Van der Waals interactions ...
shell The calcium carbonate outer layer of cnidarians, molluscs, and other animals. Produced by mucous glands.
shivering thermogenesis The generation of heat by shivering, especially within the animal body.
A shelled egg is just as impervious to sperm as to water, so its arrival coincided with the development of internal fertilization.
The embryo developing within the egg produces 4 extraembryonic membranes: the ...
The first shell has one spherical orbital called the 1s orbital. The second shell has 4 orbitals. One is spherical (called 2s) and the other three are dumbbell-shaped and at right angles to each other. These are referred to as 2p orbitals.
The bivalve shell is secreted by the mantle. The shell is composed of protein and calcium carbonate with an inner layer of pearl.
[L. cortex - outer shell, bark]. The outermost layer of an organ or the outer, less fluid cytoplasm of an egg.
Many amoeboids have shells, as do the foraminifera and radiolaria. Amoeba proteus, shown in Figure 18, is a commonly studied member. When amoeboids feed, they phagocytize their food; the pseudopods surround and engulf a prey item.
At least that's the case for species that have hard parts, like vertebrate animals, animals that have bones or shells like mollusks.
"The cochlea bears some resemblance to a common snail-shell; it forms the anterior part of the labyrinth, is conical in form, and placed almost horizontally in front of the vestibule; its apex (cupula) is directed forward and lateralward, ...
They have sophisticated organ systems, most are soft-bodied and many have a shell (exoskeleton). There are four common groups with which you may be familiar. 1. The bivalves include the clams, oysters, mussels, and scallops. 2.
Capsid - The capsid is the protein shell that encloses the nucleic acid; with its enclosed nucleic acid, it is called the nucleocapsid. This shell is composed of protein organized in subunits known as capsomers.
To pick a somewhat ridiculous example, a steel shelled turtle might be an improvement over regular turtles.
This `dark side' of oxygen relates directly to the fact that each oxygen atom has one unpaired electron in its outer valence shell, and molecular oxygen has two unpaired electrons.
Consideration should be given by the database efforts to development of shell programs for genome database queries and manipulation.
capsid -- The protein "shell" of a free virus particle.
cell -- Fundamental structural unit of all life.
shells). All cells arise from other cells through cell division. In multicellular organisms, every cell in the organism's body derives ultimately from a single cell in a fertilized egg.
The presence of a ferromagnetic foreign body (such as shell fragments) in the subject, ...
Extremely small and simple life forms made merely of a protein shell and a genome. A virus reproduces by inserting its genome into the cells of other life forms. As those cells duplicate, so does the virus.
Source : Human Genome Project Information ...
ultramicroscopic, virulent organism composed of a nucleoprotein core and a protein shell, which causes certain plant or animal diseases
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
...
chalaza (plural: chalazae) One of a pair of twisted, cords of albumin found at each end of an egg, joining the shell membrane to the yolk and supporting the yolk centrally within the shell.
In birds and reptiles, the membrane adheres to the shell and is highly vascularized to serve in gas exchange.
packing tissue. Firm, membranous tissue lining the walnut shell and separating the kernel halves.
panicle. A branching cluster of flowers held on a stem, such as the flowering parts of most grasses.
This mollusk is the worlds largest land dwelling snail. It can weigh more than 1.75 lbs. and its shell can measure up to 8 in. long. This snail has become one of Asia''s most destructive agricultural pests.
Protein clusters making up discrete subunits of a viral protein shell.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Day 1: Weigh a raw egg and place in 200ml of vinegar. Cover and leave over night. (The shell will disintegrate leaving the membrane visible).
Genetic Diversity: The genetic variation that occurs within a population or species. For example, there are several different colour dog whelk shells and ochre sea stars. See also biodiversity; compare ecosystem diversity, species diversity.
Lipoprotein particles Particles, consisting of a core of hydrophobic lipids surrounded by a shell of polar lipids and specific proteins, that play a role in the transport of cholesterol and triacylglycerols.
 See also: Organ, Trans, Animal, Plant, Human
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