15 résultats pour "leaf"
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Leaf - biology.
The mesophyll, sandwiched between the upper and lower epidermis, consists of many thin-walled cells that are usually arranged in two layers. The palisade layer is next to the upper epidermis. It consists of cylindrical cells that are packed closely together. Next to the palisade layer and making up most of the thickness of the leaf bladeis the spongy layer. The spongy layer consists of roundish cells that are packed loosely together and have numerous air spaces between them. In most plants t...
- Maple Leaf Rag - analyse de l'oeuvre.
- A transparent leaf instead of the mouth 2016/2017
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Tree - biology.
The major parts of a tree are its roots, trunk, leaves, flowers, and seeds. These components play vital roles in a tree’s growth, development, and reproduction. A Roots Trees are held in place by anchoring organs called roots. In addition to anchoring the tree, roots also absorb water and minerals through tiny structures called roothairs. From the roots the water and mineral nutrients are carried upward through the wood cells to the leaves. Although the internal structure of most kinds of roots...
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Tobacco - biology.
quality cigars are made entirely by hand, most cigars are manufactured by machine. Chewing tobaccos are generally made from thick grades of leaves to which binders and flavorings are added. Chewing tobacco is formed by pressing the tobacco intoblocks known as plugs. Snuff is made by grinding tobacco into fine powder, which is then allowed to ferment for a long period of time. Frequently, snuff is scented withspices, such as jasmine or cloves. V TOBACCO INDUSTRY Over 6 million tons of commercial...
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Photosynthesis - biology.
P680 in Photosystem II is now electron deficient because it has donated electrons to P700 in Photosystem I. P680 electrons are replenished by the water that has beenabsorbed by the plant roots and transported to the chloroplasts in the leaves. The movement of electrons in Photosystems I and II and the action of an enzyme split thewater into oxygen, hydrogen ions, and electrons. The electrons from water flow to Photosystem II, replacing the electrons lost by P680. Some of the hydrogen ions maybe...
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Les feuilles de coca
stamina and also reduces hunger and feed the person who chews. At a nutritional level ‘one hundred grams ofBolivian coca more than satisfied the recommended daily allowances of calcium, iron, phosphorus vitamin A, oxygenand riboflavin'.In text reference: (Thorpe:2000)A recent report by the WHO (World Health Organisation) also demonstrates that in its natural state, it is not harmfulto health, and even Harvard University found that this would be one of the best nutrients in the world. A typic...
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Beetle - biology.
cut, or crush prey. Beetles that consume nectar from flowers use tubelike mouthparts to suck up nectar like a primitive straw. C Thorax The thorax, the body region behind the head, consists of three segments that provide attachments for the legs and wings. Each segment of the thorax carries a pair oflegs. The middle segment also bears the stiff wing sheaths called elytra, and the hind segment holds the membranous hind wings. D Legs Beetles have six jointed legs, each leg with five parts. The f...
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Mesopotamian Art and Architecture
I
INTRODUCTION
Mesopotamian Art and Architecture, the arts and buildings of the ancient Middle Eastern civilizations that developed in the area (now Iraq) between the Tigris and
Euphrates rivers from prehistory to the 6th century
BC.
arts. III EARLY DYNASTIC PERIOD Figures from Tell AsmarCreated around 2700 bc, these stone figures are from the city of Tell Asmar in what today is Iraq. From the Temple ofAbu, the statuettes stood in watchful prayer with the wide, staring eyes often found in Sumerian sculpture. The figuresare in the Iraq Museum, Baghdād, Iraq.Art Resource, NY The first historical epoch of Sumerian dominance lasted from about 3000 BC until about 2340 BC. While earlier architectural traditions continued, a ne...
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Hormone.
women is called a follicle-stimulating hormone. When a follicle-stimulating hormone binds to an ovary cell, it stimulates the enzymes needed for the synthesis ofestradiol, a female sex hormone. Another gonadotropin called luteinizing hormone regulates the production of eggs in women and the production of the male sexhormone testosterone. Produced in the male gonads, or testes, testosterone regulates changes to the male body during puberty, influences sexual behavior, and playsa role in growth. T...
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Ant - biology.
The workers of many ant species carry a stinger within the hind end of the gaster. These ants use the stinger to defend against their enemies. In some species, workerants lack a stinger but use the tip of their gaster to squirt or dab poison at other small animals and when fighting battles with other ants, fending off predators, or killinginsects or other animals that they use as food. III PHYSIOLOGY Ants have a rigid, external skeleton called an exoskeleton that gives the soft, inner body its...
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Stanley Cup Winners.
1989 Calgary Flames 1990 Edmonton Oilers 1991-92 Pittsburgh Penguins 1993 Montréal Canadiens 1994 New York Rangers 1995 New Jersey Devils 1996 Colorado Avalanche 1997 Detroit Red Wings 1998 Detroit Red Wings 1999 Dallas Stars 2000 New Jersey Devils 2001 Colorado Avalanche 2002 Detroit Red Wings 2003 New Jersey Devils 2004 Tampa Bay Lightning 2005 No Winner* 2006 Carolina Hurricanes 2007 Anaheim Ducks * Season was canceled. Source: Source: National HockeyLeague.
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Stanley Cup Winners
Year
Champion
1893
Montréal AAA
1894
Montréal AAA
1895
Montréal Victorias
1896
Winnipeg Victorias
1897-98
Montréal Victorias
1899 Feb.
1989 Calgary Flames 1990 Edmonton Oilers 1991-92 Pittsburgh Penguins 1993 Montréal Canadiens 1994 New York Rangers 1995 New Jersey Devils 1996 Colorado Avalanche 1997 Detroit Red Wings 1998 Detroit Red Wings 1999 Dallas Stars 2000 New Jersey Devils 2001 Colorado Avalanche 2002 Detroit Red Wings 2003 New Jersey Devils 2004 Tampa Bay Lightning 2005 No Winner* 2006 Carolina Hurricanes 2007 Anaheim Ducks * Season was canceled. Source: Source: National HockeyLeague.Microsoft ® Encarta ® 2009. © 1...
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Percy Bysshe Shelley: Ode to the Westwind (Sprache & Litteratur).
Than thou, O uncontrollable! If evenI were as in my boyhood, and could be The comrade of thy wanderings over Heaven,As then, when to outstrip thy skiey speedScarce seemed a vision; I would ne’er have striven As thus with thee in prayer in my sore need.Oh, lift me as a wave, a leaf, a cloud!I fall upon the thorns of life! I bleed! A heavy weight of hours has chained and bowedOne too like thee: tameless, and swift, and proud. V Make me thy lyre, even as the forest is:What if my leaves are falling...
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Latin American Painting
I
INTRODUCTION
Diego Rivera Museum Gallery
The studio of Mexican painter Diego Rivera is now maintained as an art museum in Mexico City.
The Viceroy Arrives at PotosíThe discovery of silver on a hillside near the town of Potosí in 1545 turned this Bolivian city into a key Spanish possessionin the Americas. The population of Potosí shot up until it reached 150,000 inhabitants by the year 1611. The work shownhere, The Viceroy Arrives at Potosí, by 17th-century Bolivian painter Melchor Pérez de Holguín, was painted during thezenith of the town’s fortunes.Archivo Fotografico Oronoz From about 1580 to 1650 European styles became domin...