The name thyroid-stimulating hormone ( TSH ) has been given to a substance found in the anterior pituitary gland of all species of animal so tested for its presence.

With their often complex reproductive needs and permeable skins, amphibians are often ecological indicators and in recent decades there has been a dramatic decline in amphibian populations of many species around the globe.

A caecilian's skin has a large number of transverse folds and in some species contains tiny embedded dermal scales.

The development of the young of Ichthyophis glutinosus, a species from Sri Lanka, has been much studied.

A number of causes are believed to be involved, including habitat destruction and modification, over-exploitation, pollution, introduced species, climate change, endocrine-disrupting pollutants, destruction of the ozone layer ( ultraviolet radiation has shown to be especially damaging to the skin, eyes, and eggs of amphibians ), and diseases like chytridiomycosis.

By its inclusion the order has grown enormously in number of species.

The group has more than 23, 000 currently accepted species, spread across 1620 genera and 12 subfamilies.

Each abalone species has a typical number of holes in the selenizone which remain open.

Although the family ( Amaranthaceae ) is distinctive, the genus has few distinguishing characters among the 70 species included.

The species Amaranthus palmeri ( Palmer amaranth ) causes the greatest reduction in soybean yields and has the potential to reduce yields by 17-68 % in field experiments.

It has the capacity to get to large heights and can outcompete native plant species around it.

Ailanthus are capable of forming thick blankets of roots and heavy shade to the extent that native species are prevented from being able to reclaim an area that has been logged or deforested, as well as areas that have been heavily developed.

Widespread usage of antibacterial drugs in hospitals has also been associated with increases in bacterial strains and species that no longer respond to treatment with the most common antibacterials.

Although there were low levels of preexisting antibiotic-resistant bacteria before the widespread use of antibiotics, evolutionary pressure from their use has played a role in the development of muiltidrug resistance varieties and the spread of resistance between bacterial species.

Lastly, abiotic stress has enabled species to grow, develop, and evolve, furthering natural selection as it picks out the weakest of a group of organisms.

It has been observed through a variety of environments that as the level of abiotic stress increases, the number of species decreases.

Australia has several indigenous plants which are popular among modern ayahuasqueros there, such as various DMT-rich species of Acacia.

Moreover they argued that some species have been created for the purpose of being sacrificed and eaten by humans, that it is normal for animals to kill and eat other animals, that agriculture, too, inevitably leads to the death of many animals, that plants are living beings as well and must still be destroyed, that we unintentionally and unknowingly destroy life forms all the time, and that a hunted animal has a fair chance to survive by killing the hunter.

Acid rain has eliminated insect life and some fish species, including the brook trout in some lakes, streams, and creeks in geographically sensitive areas, such as the Adirondack Mountains of the United States.

It has not been definitively established whether the existence of these brainless species indicates that the earliest bilaterians lacked a brain, or whether their ancestors evolved in a way that led to the disappearance of a previously existing brain structure.

No modern species should be described as more " primitive " than others, strictly speaking, since each has an equally long evolutionary history — but the brains of modern hagfishes, lampreys, sharks, amphibians, reptiles, and mammals show a gradient of size and complexity that roughly follows the evolutionary sequence.

The relationship between brain size, body size and other variables has been studied across a wide range of vertebrate species.

The brain of a shark shows the basic components in a straightforward way, but in teleost fishes ( the great majority of existing fish species ), the forebrain has become " everted ", like a sock turned inside out.

* Bisexual species, in biology, one that has members of two different distinct sexes ( e. g. humans ), opposed to unisexual ( only one sex present, always females )

As a result of its relief and geographic situation, the Ubaye Valley has an " abundance of plant and animal species ".

A number of fossil cryptobranchids have been found but there are only three living species, the Chinese giant salamander ( Andrias davidianus ), the Japanese giant salamander ( Andrias japonicus ) and the hellbender ( Cryptobranchus alleganiensis ) from North America.

Altogether, over two hundred toxins have been isolated from the limited number of amphibian species that have been investigated.

Many species have an erect woody stem which is covered with persistent dried leaves unless there have been fires, topped by a crown of long thin leaves.

Abalone have long been a valuable food source for humans in every area of the world where a species is abundant.

Prohibitions on commercial and recreational harvest of this species have been in place since 1996.

By 1987 a comprehensive survey of the phylum was completed: in all, 4516 species and 339 genera had been named.

In the recent years, several of the apicomplexan species have been selected for genome sequencing.

Polyynes, a subset of this class of natural products, have been isolated from a wide variety of plant species, cultures of higher fungi, bacteria, marine sponges, and corals.

Both species of anoa have been classified as endangered since the 1960s, and the population continues to decrease.

Around 620 species have been recognised so far, with may more undescribed.

Some birds, especially corvids and parrots, are among the most intelligent animal species ; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.

In Thailand, many populations of one freshwater species have been wiped out by an introduced species of snail.

Chemicals extracted from a marine bryozoan species have been investigated for treatment of cancer and Alzheimer's Disease, but analyses have not been encouraging.

The species were depicted in Barlowe's Guide to Extraterrestrials

The species were depicted in Barlowe's Guide to Extraterrestrials

For virtually his entire publication history, he has been depicted as the most intelligent human in the DC Universe, and as one of the most intelligent beings of any planet or species.

A Martian named Tweel ( one of several species encountered ) is depicted as a sympathetic, intelligent being who thinks as well as or better than a human, but in a convincingly alien manner ( a rare feat at any time, but especially striking for pulp science fiction of that era ).

The photograph in question depicted a species of civet.

The Sontarans depicted in the series have detached, smug personalities, and a highly developed sense of honour ; on multiple occasions, the Doctor has used his knowledge of their pride in their species to manipulate them.

A disulfide species is a particular pairing of cysteines in a disulfide-bonded protein and is usually depicted by listing the disulfide bonds in parentheses, e. g., the "( 26-84, 58-110 ) disulfide species ".

The butterfly was sometimes depicted with the maw of a jaguar and some species were considered to be the reincarnations of the souls of dead warriors.

A view advocated by He Xin is that the early dragon depicted a species of crocodile, specifically, Crocodylus porosus, the saltwater crocodile, which is the largest living reptile, and once ranged into China during ancient times.

Sometimes the lions were depicted as being covered with leopard-like spots, leading some to think it a depiction of the extinct Barbary lion, which, unlike African species, had a spotted coat.

In art, literature, or movies, dwarfs are rarely depicted as ordinary people who are very short but rather as a species apart.

The species depicted in the film is A. ocellaris.

Discoveries of articulated stegosaur armor show that, at least in some species, these spikes protruded horizontally from the tail, not vertically as is often depicted.

The Trill are a fictional species of symbiotic life forms, depicted in the Star Trek media franchise.

In D & D, dragons are depicted as any of various species of large, intelligent, magical, reptilian beasts, each typically defined by a combination of their demeanor and either the color of their scales or their elemental affinity.

Most species depicted have wings and are able to fly, and nearly all are quadrupedal.

Unlike many of his species depicted on the show and despite his own personal ambition and lust for power, Mollari is also a man of honor and the moral consequences of his plots weigh on him heavily.

In the Captain N cartoon series, Ridley is depicted as one of a species.

The species is depicted on the unofficial flag of Martinique, one of the few examples ( the Flag of Mexico and the First Navy Jack of the United States being others ) of snakes being depicted on flags.

Discoveries of articulated stegosaur armor show that, at least in some species, these spikes protruded horizontally from the tail, not vertically as is often depicted.

The Madagascar national football team, nicknamed Barea ( a species of Zebu that is depicted on the country's coat of arms ), is the national team of Madagascar and is controlled by the Fédération Malagasy de Football.

The Dilgar were a race depicted in the show as an aggressive, warlike species who began a massive expansion of their empire when it was discovered their sun was soon to go supernova.