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Gallbladder cancer

Gallbladder cancer is a rare type of cancer which forms in the gallbladder. It is most common in central and South America, central and eastern Europe, China, Japan and northern India. It is also common in certain ethnic groups e.g. Native Americ ...

                                               

Ganglion

In anatomy, a ganglion is a mass of tissue in the nervous system. It is a group of nerve cells which act as a junction between different parts of the nervous system. With invertebrates, ganglia often do the work of a brain. In these cases, like t ...

                                               

Garden angelica

Garden angelica is a biennial plant from the umbelliferous family Apiaceae. Other English names are Holy Ghost, Wild Celery, and Norwegian angelica. People can eat the stem and roots. It looks very similar to some poisonous species. Because of th ...

                                               

Garter snake

The garter snake is a Colubrid snake. It is common across North America between Alaska / Canada and Central America. It is the single most widely distributed genus of reptiles in North America. It is famous for its resistance to the poison produc ...

                                               

Gas exchange

Exchange of gases or gas exchange is carried out by organisms, where different gases move in different directions. Animals, microorganisms and plants breathe out carbon dioxide and breathe in oxygen. To balance the composition of air, plants use ...

                                               

Gastritis

Gastritis is an inflammation of the lining of the stomach. It has many possible causes. The main causes are drinking too much alcohol, or using nonsteroidal anti-inflammatory drugs such as aspirin or ibuprofen for too long. Sometimes gastritis st ...

                                               

Gaza superba

The shell is 2.5 to 4 cm. in width and present a spire somewhat elavated. Apex open in adult. Umbilicus about 75% covered by callus. The color of the shelll is old ivory a Golden sheen. The early whorls faintly wine colored. The operculum is circ ...

                                               

Gemsbok

Gemsboks live in a herd of 10-40. The herds are usually set up with a dominant male and female as leaders of the herd. The males have striaght pointed horns and have been known to attack and kill lions and other predators by impaling them. The fe ...

                                               

Gene targeting

Gene targeting is a genetic technique for replacing an existing gene with a mutated one. It can be done in lab mice or some other model organism. The method can be used to delete a gene, remove control sections, add a gene, and introduce point mu ...

                                               

Genetic code

The genetic code is the set of rules by which information encoded within genetic material is translated into proteins by living cells. Biological decoding is done by the ribosome. This links amino acids together in an order specified by mRNA. It ...

                                               

Genetic drift

Genetic drift is a random effect on biological populations. Its effect is to remove genetic variation from a population of living organisms. In natural populations there are a number of forces acting. There are forces which add heritable variatio ...

                                               

Gerbil

The gerbils are a family of rodents. There are about 110 species of gerbils. All gerbils are adapted to arid habitats. At one time, gerbils were known as wild rats. Most gerbils are diurnal, some are crepuscular. The gerbil is native to Central A ...

                                               

German Spaniel

The German Spaniel, also known as the Deutscher Wachtelhund, is a medium size spaniel type of gun dog that was developed in Germany around 1890.

                                               

Gestational diabetes

Gestational diabetes is a condition in which females who previously were not having diabetes exhibit higher than normal levels of blood sugar while pregnant. The illness usually shows few signs / symptoms. It is usually found during pregnancy med ...

                                               

Giant isopod

Giant isopods are big crustaceans that live at the bottom of the ocean. They can grow up to 45 cm long and weigh up to 1.7 kg. Currently about 9 different species are known. Giant isopods usually eat dead whales, fish and squid. They may also be ...

                                               

Giant tube worm

The giant tube worm is an annelid. They live on the floor of the oceans, usually near black smokers, a type of hydrothermal vent. They can tolerate extremely high temperatures and levels of sulfur. They live in symbiosis with certain bacteria. Th ...

                                               

Gila monster

The Gila monster is a venomous desert lizard. The Gila monster’s name comes from the Gila River in Arizona, USA. The Gila monster is heavy and slow for a lizard. It can grow up to 2 feet60 cm long. Its skin looks like beads and is black, pink, or ...

                                               

Gingivitis

Gingivitis is the inflammation of the gums around the teeth. Gingivitis may be caused by a buildup of plaque and tartar because the teeth have not been cleaned properly. It can also be a manifestation of a systemic disease, as in diabetes or AIDS ...

                                               

Giraffoidea

† Orangemeryx. † Sperrgebietomeryx. † Climacoceras. Family † Climacoceratidae. † Prolibytherium. Superfamily Giraffoidea. † Nyanzameryx. † Propalaeoryx. † Bramatherium. † Sivatherium. † Decennatherium. † Helladotherium. † Georgiomeryx. † Mitilano ...

                                               

Gland

A gland is a group of cells in the body which make substances such as hormones. They are in humans and other animals, and in plants. If the substance is put directly into the bloodstream, the gland is called endocrine gland. If the substance is c ...

                                               

Glass lizard

Glass lizards, or glass snakes, are a genus of reptiles that look like snakes. Although most species have no legs, their head shapes, movable eyelids, and external ear openings show they are lizards. A few species have very small, stub-like legs ...

                                               

Glial cell

Glial cells are support cells for the nervous system. In Greek, Glia means "glue". Glia are said to be the glue of the nervous system. Glia occur in both grey matter and white matter. Glia are thought to have four main functions: To destroy patho ...

                                               

Glossy-mantled manucode

The glossy-mantled manucode is a medium-sized bird of paradise, around 42cm long, glossed green, blue and purple black with a red iris, black bill, long tail and somewhat elongated upper breast and neck feathers. They can be found in the lowlands ...

                                               

Glow-worm

A glow-worm, or glowworm, is an insect. Other names for glow-worms are fire-fly and lightning bug. There are several insects given this name. Most are beetles, but one is a fly, Arachnocampa. They are nocturnal, active during the night. They have ...

                                               

Golden lion tamarin

The golden lion tamarin, also called the golden lion marmoset is a small, squirrel-sized monkey with a lion-like mane. Tamarins live in small family groups. They are diurnal most active during the day, at night, they rest in the cavity of a tree. ...

                                               

Goldenrod

Goldenrods are any of the about 150 species of weedy herbs that make up the genus Solidago. Handling the goldenrod many times can make some people have allergies. Because of this, some florists change their jobs. Parts of goldenrods are eaten by ...

                                               

Goliath frog

The goliath frog or giant slippery frog is the biggest type of frog on Earth. It can grow to 32 centimetres long and weigh up to 3.25 kilograms. Its natural habitat is western Africa. In 2019, scientists learned that the frog does something unusu ...

                                               

Gonadotropin-releasing hormone

Gonadotropin-releasing hormone, or Luteinizing-hormone-releasing hormone, is a hormone synthesized and released from neurons in the hypothalamus. GnRH is responsible for the release of follicle-stimulating hormone FSH and luteinizing hormone LH f ...

                                               

Gondwanatheria

Gondwanatheria is an extinct group of mammals that lived during the Upper Cretaceous to the end of the Eocene. They lived in the Southern Hemisphere continents which had been part of the supercontinent Gondwana. These mammals are known only from ...

                                               

Goniatite

Goniatites are a type of ammonite. They are cephalopods from the Order Goniatitida. They evolved from earlier forms in the Middle Devonian some 390 million years ago. All goniatites had an external shell like other ammonites. It was divided inter ...

                                               

Gonorrhea

Gonorrhea is a disease. It is transmitted by having sex. It is among the most widespread sexually transmitted diseases. Gonorrhea is also sometimes called "the clap." Gonorrhea can be cured using antibiotics but the entire course of antibiotics m ...

                                               

Egyptian goose

The Egyptian goose is a member of the duck, goose, and swan family, Anatidae. It lives in Africa, south of the Sahara and the Nile River Valley. Egyptian geese were thought to be sacred by the people in Ancient Egypt. They appeared in much of the ...

                                               

Gorgonopsid

The Gorgonopsids were Therapsids, a group of tetrapods which eventually gave rise to the mammals. Gorgonopsids were a successful group which lived during the Permian period, about 260 million years ago. They became extinct in the Permian–Triassic ...

                                               

Gorgosaurus

Gorgosaurus is a genus of theropod dinosaur that lived in western North America during the Upper Cretaceous, between about 76.5 and 75 million years ago. Fossil remains have been found in the Canadian province of Alberta and possibly the U.S. sta ...

                                               

Graphania

Graphania is a genus of moths. It is part of the Noctuidae family. The genus is made up of more than 100 species. Some of them are: Graphania agorastis – Meyrick, 1887. Graphania sequens – Howes, 1912. Graphania bromias – Meyrick, 1902. Graphania ...

                                               

Graphiurus

The African dormouse, Graphiurus, is a genus of dormouse that lives throughout sub-Saharan Africa in different habitats. They are good at climbing. They have bushy tails. They eat invertebrates and small vertebrates.

                                               

Gray-tailed mountain-gem

The gray-tailed mountain-gem is a species of hummingbird. It lives in the mountains of southern Costa Rica from the Cordillera de Talamanca southward to the border with Panama. Male gray-tailed mountain-gems have iridescent emerald green with a t ...

                                               

Grazer

A grazer is an animal, usually a herbivorous mammal, which eats grass. It is contrasted with browsers, which eat trees & shrubs. The life-style, dentition teeth, and digestive system of grazers is different from browsers, to handle the problems o ...

                                               

Great auk

The great auk was a large bird, that could not fly. People hunted it for meat and feathers. It grew rare, because it was too easy to kill, and the ones left could not breed fast enough to make up for the lost ones. The last known great auks were ...

                                               

Great hornbill

The great hornbill also known as great Indian hornbill or great pied hornbill, is one of the larger members of the hornbill family. Great hornbills are found in the forests of Nepal, India, the Malay Peninsula and Sumatra, Indonesia. Their impres ...

                                               

Great Northern Diver

The great Northern diver or common loon is a bird. It belongs to the diver family of birds. Adult birds are between 70 and 90 cm in length, and have wingspans of 1.20 metres to 1.50 metres. The Great Northern Loon breeds in North America, Greenla ...

                                               

Great tit

The great tit is a passerine bird in the tit family Paridae. It is found throughout Europe, the Middle East, Central and Northern Asia, and parts of North Africa. Most great tits do not migrate except in places with harsh winters. The great tit h ...

                                               

Greater spotted eagle

The greater spotted eagle, occasionally just called the spotted eagle, is a large bird of prey. Like all typical eagles, it belongs to the family Accipitridae. In summer it lives in eastern Eurasia, and winters further south.

                                               

Green algae

Green algae are microscopic protists. One can find them in all sorts of natural water: salt water, freshwater and brackish water. The group is less used in classification today. Although most are descended from a common ancestor, some are not. So ...

                                               

Green and golden bell frog

The green and golden bell frog is a frog from Australia, but it also lives in New Zealand as an invasive specie. Male adult frogs can be 5.7 to 6.9 cm long. Female adult frogs can be 6.5 to 10.8 cm long. These frogs are green with bronze spots. T ...

                                               

Green big-eyed tree frog

The green big-eyed tree frog is a large tree frog from New Guinea. Scientists saw it in many places in the mountains in the middle of the island, between 600 and 1500 meters above sea level. They saw it in Indonesia and in Papua New Guinea. The m ...

                                               

Green fluorescent protein

GFP ia a Green Florescent Protein, that can be found in a moon jellyfish. This is a substance that helps scientists with looking at cell molecules. There is also another substance the is called RFP that serves the same purpose but is red, and is ...

                                               

Green toad

Green toad is a species of toads. They live in southwestern United States in states like Arizona, New Mexico, Colorado, Kansas and Texas. They can also be found in northern Mexico in states like Tamaulipas, San Luis Potosi, Durango and Zacatecas. ...

                                               

Green-thighed frog

The green-thighed frog is a frog from Australia. It lives near the east coast of Australia near Brisbane. The green-thighed frog is mostly brown with black stripes from its mouth to its front legs. Its thighs are light blue or green with black sp ...

                                               

Greenland halibut

The Greenland halibut or Greenland turbot is part of the Pleuronectidae family and is the only species of the genus Reinhardtius. It is a deep water fish, ranging between about 200 and 1.600 m 700 and 5.200 ft, and is found in the northern Atlant ...

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