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Hemerophile

Hemerophile is a term used for animals and plants that profit from the changes humans have made to their environment. For this reason, they can often be found in the cultural landscape of humans; they are said to follow humans. Some species that ...

                                               

Herbivore

Herbivores are animals that only eat plants. They are herbivorous animals. Herbivores have teeth that are adapted to grind vegetable tissue. Many animals that eat fruit and leaves sometimes eat other parts of plants, for example roots and seeds. ...

                                               

Holocene extinction

The Holocene extinction is, first of all, the extinction of nearly all large mammal species after the end of the ice age. This is attributed to hunting by humans, and climate change. Habitat destruction and over-harvesting are two of the primary ...

                                               

Insectivore

An insectivore is an animal or insect that eats mostly insects for food. An Anteater is an animal that eats ants. There are also some plants that eat insects. One plant that is an insectivore is called a Venus fly-trap. To eat insects for food is ...

                                               

Introduced species

An introduced species is an organism that is not native to a given place. It has been brought there by human activities. This introduction may be deliberate or accidental. They can cause problems when they become pests and damage the ecosystem th ...

                                               

Jovian

Jovian was a Coquerels sifaka lemur, best known for mainly portraying Zoboomafoo in the series of the same name. On November 10, 2014, Jovian died at his home in the Duke Lemur Center of renal failure at age 20. Jovian was born in the spring of 1 ...

                                               

Larva

Many animals develop in separate stages. A larva develops from the egg in those animals. It is a separate life stage from the adult reproductive stage. A larva does not look like the adult animal, and changes shape as it grows up. There may be se ...

                                               

Lop rabbit

Lop rabbit or lop-eared rabbit is a breed of domestic rabbit that was recognized by the American Rabbit Breeders Association in 1979 and by the Netherlands Governing Rabbit Council in 1984. The different breeds are American Fuzzy Lop, Cashmere Lo ...

                                               

Male

Male is one of two genders. Most species have two sexes – male and female. Human males are men or boys; human females are women or girls. The two sexes have different sexual organs, and different secondary sex characteristics. They also often hav ...

                                               

Nemertodermatida

                                               

Nest

A nest is place animals build to hold their eggs or provide a place to raise their babies. They are most typical of birds, but many other vertebrates do make nests. Nests may be composed of organic material such as twigs, grass, and leaves. They ...

                                               

Pack hunter

A pack hunter or social predator is a predator belonging to the animal kingdom, which has evolved to hunt its prey by working together with other members of its species. Normally animals hunting in this way are closely related. Except where only ...

                                               

Panarthropoda

The Panarthropoda are a clade of ecdysozoans that consist of Dinocaridida, "Lobopodia", Onychophora, and Tactopoda. Most members of this group have claws and legs, and a segmented body.

                                               

Pig

Pigs or domestic pigs are mammals in the genus Sus. They are the and its ancestor, the common Eurasian wild boar, and other species. Pigs are in the Suidae family of even-toed ungulates. Related, but outside the genus, are the babirusa and the wa ...

                                               

Scent marks

Scent marks are what animals leave when they are marking their territory. The leader of the pack rubs his/her scent on his/her pack. This helps establish which animal belongs to which pack, and also which animal is the leader.

                                               

Seasonal breeder

Seasonal breeders are animal species that mate only during certain times of the year. These times of year are usually best for the survival of the young. Factors include ambient temperature, food and water availability, and even changes in the pr ...

                                               

Service animal

Service animals are animals that have been trained to do things to help people with disabilities. Service animals may also be called assistance animals, assist animals, support animals, or helper animals, depending on the country and what the ani ...

                                               

Sexual dimorphism

Sexual dimorphism is a concept in biology. It means that the male and the female of a species look noticeably different. The word comes from the Greek: di and morphe. It is the most common type of polymorphism. It may be the result of sexual sele ...

                                               

Stud (animal)

A stud in animal breeding is a male animal, such as a horse or dog, that is employed for breeding. The terms for the male of a given animal species usually mean that the animal is entire, that is, not castrated, and therefore capable of standing ...

                                               

Tactopoda

                                               

Threat display

A threat display is anything that an animal does to scare away other animals. A dog will bare its teeth and growl. A cat will hiss. A snake will coil up, raise its head, and move back and forth to point itself at any big animal that approaches it ...

                                               

Tornjak

The Tornjak, is a Bosnian and Herzegovinian – Croatian Shepherd dog. It is a mountain sheep dog native to Bosnia and Herzegovina and Croatia. The dog was mentioned in documents in the 11th and 14th-century. It almost became extinct, but was saved ...

                                               

Tullimonstrum

Tullimonstrum, colloquially known as the Tully Monster, is an extinct bilaterian animal that lived in shallow tropical coastal waters of muddy estuaries during the Pennsylvanian geological period, about 300 million years ago. A single species, T. ...

                                               

Veterinarian

A veterinarian or a vet, is someone who gives animals Veterinary medicine or medical treatment. They are doctors for animals. There are many different types of veterinarians; some work with small animals, large farm animals, or wild animals. Vete ...

                                               

Veterinary medicine

Veterinary medicine is a branch of medicine that deals with the health of animals. It is the study and practice of preventing, diagnosing and treating disease and injuries in animals. Veterinary medicine covers all species of animals, including b ...

                                               

Xerocole

A xerocole, meaning to inhabit), is an animal adapted to live in the desert. The main problems these animals face are very little water to drink, and a very hot environment. Xerocoles tend to be nocturnal or crepuscular to escape the heat.

                                               

Bacteria

Bacteria are very small organisms. They are prokaryotic microorganisms. Bacterial cells do not have a nucleus, and most have no organelles with membranes around them. Most have a cell wall. They do have DNA, and their biochemistry is basically th ...

                                               

Avery–MacLeod–McCarty experiment

The Avery–MacLeod–McCarty experiment was reported in 1944 by Oswald Avery, Colin MacLeod, and Maclyn McCarty, that DNA is the substance that causes bacterial transformation. This was the culmination of research in the 1930s and early 1940s at the ...

                                               

Bacillus (shape)

A bacillus is a rod-shaped cylindrical bacterium. Bacilli are found in many different taxonomic groups of bacteria. When the name Bacillus is capitalized and italicized, it refers to a specific genus of bacteria. If it is not capitalized or itali ...

                                               

Bacterial conjugation

Bacterial conjugation is the transfer of genetic material between bacterial cells by direct cell-to-cell contact or by a bridge-like connection between two cells. Conjugation is a mechanism of horizontal gene transfer, as are transformation and t ...

                                               

Bacterial microcompartment

A bacterial microcompartment is a structure inside bacteria. They are made of a protein shell which surrounds and encloses various enzymes. They are similar to eukaryotic cell organelles, but do not have plasma membranes. They do not contain lipi ...

                                               

Bacteriology

Microorganisms such as bacteria, protozoa, fungi, and viruses are studied by "microbiologists". However, bacteriology is a distinct science, because the make-up and inheritance of bacteria is rather different from the other groups.

                                               

Binary fission

Binary fission is a kind of asexual reproduction. It is the most common form of reproduction in prokaryotes such as bacteria. It occurs in some single-celled Eukaryotes like the Amoeba and the Paramoecium. In binary fission DNA replication and se ...

                                               

Bioprecipitation

Bioprecipitation is a theory about rain-making bacteria. It was proposed by David Sands from Montana State University in 1982. They believe that biological ice nuclei have the ability to catalyze freezing at warmer temperatures. New research show ...

                                               

Candidatus

Candidatus is a term in the taxonomy of bacteria. It is a label put before the name of a bacterium which cannot be grown on an agar plate or in any other bacteriology culture. An example would be Candidatus Phytoplasma allocasuarinae". Candidatus ...

                                               

Chloroflexi

Chloroflexi is one of four classes of bacteria that produce energy from light and are named for their green pigment, usually found in photosynthetic bodies. Chloroflexi are typically filamentous they look like microscopic strings, and can move ab ...

                                               

Coccus

A coccus is a bacterium that is shaped like a sphere or circle. Cocci are one of the three types of bacteria shapes. The word coccus comes from the Greek word kokkos, or "berry". Some examples of cocci are Abiotrophia, Enterococcus, Neisseria, St ...

                                               

Gram staining

Gram staining is a way of classifying bacteria into two large groups: gram-positive and gram-negative. The name comes from its inventor, Hans Christian Gram. Grams method stains bacteria according to the chemical and physical properties of their ...

                                               

Griffiths experiment

Griffiths Experiment was an experiment done in 1928 by Frederick Griffith. It was one of the first experiments showing that bacteria can get DNA through a process called transformation. Griffith used two strains of Streptococcus pneumoniae. He th ...

                                               

Hershey–Chase experiment

The Hershey–Chase experiments were a series of experiments started in 1952 by Alfred Hershey and Martha Chase. These experiments were to confirm that DNA was the genetic material in living things, which had previously been discovered by the Swiss ...

                                               

Integron

An integron is a type of transposon, a mobile genetic element. It is a two-part genetic system found in bacteria, and maybe more widely. It is the way antibiotic resistance is passed on so rapidly. It is found in plasmids and chromosomes. Althoug ...

                                               

Kochs postulates

Kochs postulates are four ideas about the relationship between a microbe and a disease. The postulates were made by Robert Koch and Friedrich Loeffler in 1884, based on earlier ideas of Jakob Henle. They were refined and published by Koch in 1890 ...

                                               

Lactic acid bacteria

Lactic acid bacteria are bacteria which make lactic acid. This is an end product of carbohydrate fermentation. The bacteria change carbohydrates to lactic acid and energy. The bacteria are the order Lactobacillales. Most of them are anaerobic: th ...

                                               

Lichen

Lichens are a symbiosis of at least two quite different organisms. The partnership always involves a fungus, which lives with one or more partners which can do photosynthesis. The photobiont partner may be a green algae and/or a cyanobacterium. p ...

                                               

Mollicutes

The Mollicutes are a class of bacteria with no bacterial cell wall. Mycoplasma is the best-known genus. They are very small, only about 0.2–0.3 μm in size, and have a very small genome. Most move about by gliding across host cells, but Spiroplasm ...

                                               

Mycobacterium

Mycobacterium is a genus of bacteria, with about 100 species.The genus includes pathogens known to cause serious diseases in mammals, including tuberculosis and leprosy. Mycobacteria can colonize their hosts without the hosts showing any adverse ...

                                               

Phytoplasma

Phytoplasmas are a type of parasitic bacteria. They are pathogens of economically important plants, including coconut, sugarcane, and sandalwood. They are obligate parasites of plant phloem tissue. Their vectors are insects which inject then into ...

                                               

Plasmid

A plasmid is a DNA molecule that is separate from the chromosomal DNA and that can replicate independently. The term plasmid was first introduced by the American molecular biologist Joshua Lederberg in 1952. Plasmids are double stranded and, in m ...

                                               

Slime flux

Slime flux, or bacterial wetwood, is a bacterial disease of trees. A wound to the bark causes sap to ooze from the wound. Bacteria may infect this sap. Eventually, a slimy ooze results. This may sink into the tree, and can eventually kill the tre ...

                                               

Spirillum

Spirillum is any bacterium that is shaped like a spiral. It is one of the three shapes of bacteria. The other two are Coccus and Bacillus.It can be said as Spiral Bacteria. Spirillum is also the name of a genus of Gram-negative bacteria in the fa ...

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