210 résultats pour "biology"
- Octopus - biology.
- Caecilian - biology.
- Catfish - biology.
- Cactus - biology.
- Tick - biology.
- Sponge - biology.
- Earthworm - biology.
- Platypus - biology.
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- Gene - biology.
- Parrot - biology.
- Trout - biology.
- Tuna - biology.
- Cockatiel - biology.
- Lamprey - biology.
- Lizard - biology.
- Hummingbird - biology.
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- Bean - biology.
- Ostrich - biology.
- Condor - biology.
- Pigeon - biology.
- Dragonfly - biology.
- Forestry - biology.
- Lungfish - biology.
- Parakeet - biology.
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- Moose - biology.
- Coelacanth - biology.
- Rat - biology.
- Wheat - biology.
- Piranha - biology.
- Crustacean - biology.
- Biotechnology - biology.
- Lemur - biology.
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- Woodpecker - biology.
- Beaver - biology.
- Deer - biology.
- Weed - biology.
- Protista - biology.
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Mollusk - biology.
Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights reserved.
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Cnidarians - biology.
small, inconspicuous polyps. Polyps reproduce asexually to form a medusa—saucer-like structures bud off the polyp and swim away as new medusae. C Cubozoa The medusa phase dominates in animals in the Cubozoan class. Cubozoan medusae are commonly called box jellies because they have a cube shape with a singletentacle or group of tentacles hanging from each corner at the mouth end of the animal. The Cubozoan polyp is small and inconspicuous and an entire polyp transformsinto a medusa in a type of...
- Seed - biology.
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Marsupial - biology.
Microsoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights reserved.
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Cattle - biology.
head, and the leading states are Texas, Missouri, Oklahoma, South Dakota, Nebraska, Kansas, Montana, Iowa, Colorado, and California. Dairy cattle in the United Statesare estimated to number 9.2 million head; the leading states are California, Wisconsin, New York, Pennsylvania, Minnesota, Texas, Idaho, New Mexico, Ohio, and Iowa. See also Animal Husbandry; Branding; Diseases of Animals. Contributed By:Perry Thomas CuppsMicrosoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights r...
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Sheep - biology.
fine-wool or crossbred ewes, they are bred to rams of the Down breeds for the production of lambs for meat. The bands may be moved from place to place to takeadvantage of cheap feeds and natural forage. Similar operations are used on lands with developed pastures. If abundant forage is available, the lambs may bemarketed directly after weaning. If the lambs have not reached marketable condition, they may be moved to feedlots and given additional food before they are sold. Some breeders specializ...
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Reproduction - biology.
E Gestation After fertilization of the egg, the resulting zygote undergoes cell division and differentiation to form the embryo. In most higher plants, the embryo is enclosed in a layerof nutritive material surrounded by a hard outer covering, forming the seed. In most lower animals the embryo, surrounded by the nutritive material of the formerovum, is enveloped by a leathery or calcareous shell and is extruded from the body of the female. Animals, such as birds, that lay their eggs before the...
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Rattlesnake - biology.
Rattlesnakes are declining in number. The greatest threat to their survival is the destruction of their habitats. Snakes also suffer when their habitats are divided intofragments separated by roads, farms, housing developments, and shopping malls, making it harder for them to find mates, food, and breeding sites. In addition, tensof thousands of rattlesnakes are collected and killed each year by hunters who sell their patterned skin so that it can be made into such products as boots, ties, andbe...
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Chimpanzee - biology.
separate occasions in Central Africa, probably beginning in the 1940s or 1950s. Chimpanzees infected with the original retrovirus or with HIV do not develop AIDS,however. Scientific classification: Chimpanzees belong to the Primate order. Some scientists classify chimpanzees in the family Pongidae and other scientists place chimpanzees in the family Hominidae. They make up the genus Pan. The common chimpanzee is classified as Pan troglodytes. The bonobo is classified as Pan paniscus. Micr...
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Bee - biology.
wood. They have long tongues and are excellent pollinators of many plants. They carry their pollen on brushy areas near the middle of the hind leg. Carpenter bees are also in the digger bee family. The most familiar bees are the honey bees and their close relatives. In this family are bees that make intricate nests and live in complex societies. The pollen-carrying structure in these bees is a smooth, bristle-surrounded area on one segment of the hind leg. This structure is known as a pollen...
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Gorilla - biology.
the DRC, Rwanda, and Uganda, along with a small population of gorillas on the Nigeria and Cameroon border, are most at risk. Each of these populations numbers onlyin the hundreds. Prominent gorilla conservation projects have been established in selected areas in an attempt to reverse the trend of declining population sizes. These programs havepioneered the development of ecotourism, in which tourists pay to visit areas with interesting natural and cultural features. Conservationists also work wi...
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Coffee - biology.
States law, the addition of chicory or any other substance must be clearly stated on the brand label. IV HISTORY Exactly where and when coffee was first cultivated is not known, but some authorities believe that it was grown initially in Arabia near the Red Sea about AD675. Coffee cultivation was rare until the 15th and 16th centuries, when extensive planting of the tree occurred in the Yemen region of Arabia. The consumption of coffee increasedin Europe during the 17th century, prompting the...
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Grasses - biology.
This, together with details of overall structure and less easily observed characteristics of anatomy, cytology, and chemistry, accounts for the tremendous number ofspecies of grasses. VI OTHER GRASSLIKE PLANTS Plants of two other groups, the sedges and the rushes, are superficially similar to grasses and are often confused with them. The three groups are easily distinguished,however, by examining their flowers, stems, and leaves. Rushes have flowers with six-part perianths (floral whorls) and...