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Q912
what do Acarina eat?
Spider
As of 2008, at least 43,678 spider species , and 109 families have been recorded by taxonomists ; however, there has been confusion within the scientific community as to how all these families should be classified, as evidenced by the over 20 different classifications that have been proposed since 1900.
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Q912
what do Acarina eat?
Spider
Anatomically, spiders differ from other arthropods in that the usual body segments are fused into two tagmata , the cephalothorax and abdomen , and joined by a small, cylindrical pedicel .
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Q912
what do Acarina eat?
Spider
Unlike insects , spiders do not have antennae .
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Q912
what do Acarina eat?
Spider
In all except the most primitive group, the Mesothelae , spiders have the most centralized nervous systems of all arthropods, as all their ganglia are fused into one mass in the cephalothorax.
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Q912
what do Acarina eat?
Spider
Unlike most arthropods, spiders have no extensor muscles in their limbs and instead extend them by hydraulic pressure.
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Q912
what do Acarina eat?
Spider
Their abdomens bear appendages that have been modified into spinnerets that extrude silk from up to six types of silk glands within their abdomen.
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Q912
what do Acarina eat?
Spider
Spider webs vary widely in size, shape and the amount of sticky thread used.
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Q912
what do Acarina eat?
Spider
It now appears that the spiral orb web may be one of the earliest forms, and spiders that produce tangled cobwebs are more abundant and diverse than orb-web spiders .
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Q912
what do Acarina eat?
Spider
Spider-like arachnids with silk-producing spigots appeared in the Devonian period about , but these animals apparently lacked spinnerets.
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Q912
what do Acarina eat?
Spider
True spiders have been found in Carboniferous rocks from , and are very similar to the most primitive surviving order , the Mesothelae .
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Q912
what do Acarina eat?
Spider
The main groups of modern spiders, Mygalomorphae and Araneomorphae , first appeared in the Triassic period, before .
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Q912
what do Acarina eat?
Spider
A herbivorous species, Bagheera kiplingi , was described in 2008, but all other known species are predators , mostly preying on insects and on other spiders, although a few large species also take birds and lizards.
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Q912
what do Acarina eat?
Spider
Spiders use a wide range of strategies to capture prey: trapping it in sticky webs, lassoing it with sticky bolas , mimicking the prey to avoid detection, or running it down.
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Q912
what do Acarina eat?
Spider
Most detect prey mainly by sensing vibrations, but the active hunters have acute vision, and hunters of the genus Portia show signs of intelligence in their choice of tactics and ability to develop new ones.
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Q912
what do Acarina eat?
Spider
Spiders' guts are too narrow to take solids, and they liquidize their food by flooding it with digestive enzymes and grinding it with the bases of their pedipalps , as they do not have true jaws.
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Q912
what do Acarina eat?
Spider
Male spiders identify themselves by a variety of complex courtship rituals to avoid being eaten by the females.
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Q912
what do Acarina eat?
Spider
Males of most species survive a few matings, limited mainly by their short life spans.
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Q912
what do Acarina eat?
Spider
Females weave silk egg-cases, each of which may contain hundreds of eggs.
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Q912
what do Acarina eat?
Spider
Females of many species care for their young, for example by carrying them around or by sharing food with them.
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Q912
what do Acarina eat?
Spider
A minority of species are social, building communal webs that may house anywhere from a few to 50,000 individuals.
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Q912
what do Acarina eat?
Spider
Social behavior ranges from precarious toleration, as in the widow spiders , to co-operative hunting and food-sharing.
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Q912
what do Acarina eat?
Spider
Although most spiders live for at most two years, tarantulas and other mygalomorph spiders can live up to 25 years in captivity.
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Q912
what do Acarina eat?
Spider
While the venom of a few species is dangerous to humans, scientists are now researching the use of spider venom in medicine and as non-polluting pesticides .
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Q912
what do Acarina eat?
Spider
Spider silk provides a combination of lightness, strength and elasticity that is superior to that of synthetic materials, and spider silk genes have been inserted into mammals and plants to see if these can be used as silk factories.
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Q912
what do Acarina eat?
Spider
As a result of their wide range of behaviors, spiders have become common symbols in art and mythology symbolizing various combinations of patience, cruelty and creative powers.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Grey's Anatomy is an American television medical drama that premiered on the American Broadcasting Company (ABC), as a mid-season replacement on March 27, 2005.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
The series has aired nine seasons, and focuses on the fictional lives of surgical interns and residents as they gradually evolve into seasoned doctors, while trying to maintain personal lives.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
The show's premise originated with Shonda Rhimes , who serves as an executive producer, along with Betsy Beers , Mark Gordon , Krista Vernoff , Rob Corn , Mark Wilding , and Allan Heinberg .
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
The series was created to be racially diverse, utilizing a color-blind casting technique.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
It is primarily filmed in Los Angeles , California .
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
The series' protagonist is Dr. Meredith Grey ( Ellen Pompeo ), who originally is accepted into the residency program at the fictional Seattle Grace Hospital.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Meredith is assigned to work under Dr. Miranda Bailey ( Chandra Wilson ), along with Dr. Cristina Yang ( Sandra Oh ), Dr. George O'Malley ( T. R. Knight ), Dr. Izzie Stevens ( Katherine Heigl ), and Dr. Alex Karev ( Justin Chambers ).
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Following O'Malley's death and Stevens' departure, the hospital's merger with Mercy West brings in Dr. Jackson Avery ( Jesse Williams ) and Dr. April Kepner ( Sarah Drew ), in the sixth season .
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
The surgical wing is primarily supervised by Dr. Richard Webber ( James Pickens, Jr. ), who is eventually replaced by Dr. Derek Shepherd ( Patrick Dempsey ), and later Dr. Owen Hunt ( Kevin McKidd ).
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Dr. Preston Burke ( Isaiah Washington ) departs at the conclusion of the third season , and is replaced by Dr. Erica Hahn ( Brooke Smith ), who leaves the show during the fifth season , and later Dr. Teddy Altman ( Kim Raver ), who departs at the end of the eighth season .
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Introduced in the second season is Dr. Addison Montgomery ( Kate Walsh ), who leaves the show at the end of the third season, in order to launch her own spin-off medical drama Private Practice .
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Dr. Callie Torres ( Sara Ramirez ) and Dr. Mark Sloan ( Eric Dane ) also enter the show in the second season, while the latter dies in the premiere of the ninth season.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Meredith's half-sister, Dr. Lexie Grey ( Chyler Leigh ), appears from season three and dies at the end of season eight.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Dr. Arizona Robbins ( Jessica Capshaw ) is given series regular status at the beginning of the sixth season.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Grey's Anatomy is the highest-rated drama in the key 18–49 demographic .
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Previously among the overall top-ten rated shows in the United States, Grey's Anatomy has been well received by critics.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
Considered an impact on culture, the series has received numerous awards , and has also been included in various critics' top ten lists.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
The show has produced several specials, as well as distributed all seasons to DVD, and released a collection of merchandise.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
In 2012, Grey's Anatomy was named the fifth-highest revenue earning show, in terms of advertising per half-hour.
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Q913
how many seasons of grey's anatomy are there
Grey's Anatomy
On May 11, 2012, the series was renewed for a ninth season, which premiered on September 27, 2012.
11
Q914
how is schizophrenia diagnosed?
Schizophrenia
Schizophrenia ( or ) is a mental disorder characterized by a breakdown of thought processes and by a deficit of typical emotional responses.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
Common symptoms include auditory hallucinations , paranoid or bizarre delusions , or disorganized speech and thinking , and it is accompanied by significant social or occupational dysfunction.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
The onset of symptoms typically occurs in young adulthood, with a global lifetime prevalence of about 0.3–0.7%.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
Diagnosis is based on observed behavior and the patient's reported experiences.
11
Q914
how is schizophrenia diagnosed?
Schizophrenia
Genetics , early environment, neurobiology , and psychological and social processes appear to be important contributory factors; some recreational and prescription drugs appear to cause or worsen symptoms.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
Current research is focused on the role of neurobiology, although no single isolated organic cause has been found.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
The many possible combinations of symptoms have triggered debate about whether the diagnosis represents a single disorder or a number of discrete syndromes.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
Despite the etymology of the term from the Greek roots skhizein (σχίζειν, "to split") and phrēn, phren- (φρήν, φρεν-; "mind"), schizophrenia does not imply a "split personality", or "multiple personality disorder" (which is known these days as dissociative identity disorder )—a condition with which it is often confused in public perception.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
Rather, the term means a "splitting of mental functions", because of the symptomatic presentation of the illness.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
The mainstay of treatment is antipsychotic medication, which primarily suppresses dopamine (and sometimes serotonin ) receptor activity.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
Psychotherapy and vocational and social rehabilitation are also important in treatment.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
In more serious cases—where there is risk to self and others— involuntary hospitalization may be necessary, although hospital stays are now shorter and less frequent than they once were.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
The disorder is thought mainly to affect cognition , but it also usually contributes to chronic problems with behavior and emotion.
00
Q914
how is schizophrenia diagnosed?
Schizophrenia
People with schizophrenia are likely to have additional ( comorbid ) conditions, including major depression and anxiety disorders ; the lifetime occurrence of substance use disorder is almost 50%.
00
Q914
how is schizophrenia diagnosed?
Schizophrenia
Social problems, such as long-term unemployment, poverty, and homelessness are common.
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Q914
how is schizophrenia diagnosed?
Schizophrenia
The average life expectancy of people with the disorder is 12 to 15 years less than those without, the result of increased physical health problems and a higher suicide rate (about 5%).
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Q915
what did paul snider, dorothy stratten's husband look
Paul Snider
Paul Leslie Snider (April 15, 1951–August 14, 1980) was the estranged husband and manager of Playboy model Dorothy Stratten , whom he murdered before killing himself the same day.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
The Epic of Gilgamesh, an epic poem from Mesopotamia , is amongst the earliest surviving works of literature .
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
The literary history of Gilgamesh begins with five independent Sumerian poems about 'Bilgamesh' (Sumerian for Gilgamesh ), king of Uruk .
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
Four of these were used as source material for a combined epic in Akkadian .
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
This first combined epic, known as the "Old Babylonian" version, dates to the 18th century BC and is titled after its incipit , Shūtur eli sharrī ("Surpassing All Other Kings").
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
Only a few fragments of it have survived.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
The later "Standard Babylonian" version dates from the 13th to the 10th centuries BC and bears the incipit Sha naqba īmuru ("He who Saw the Deep").
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
Fragments of approximately two thirds of this longer, twelve-tablet version have been recovered.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
Some of the best copies were discovered in the library ruins of the 7th-century BC Assyrian king Ashurbanipal .
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
The story centers on a friendship between Gilgamesh and Enkidu .
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
Enkidu is a wild man created by the gods as Gilgamesh's equal to distract him from oppressing the people of Uruk .
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
Together, they journey to the Cedar Mountain to defeat Humbaba , its monstrous guardian.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
Later they kill the Bull of Heaven, which the goddess Ishtar sends to punish Gilgamesh for spurning her advances.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
As a punishment for these actions, the gods sentence Enkidu to death.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
The second half of the epic focuses on Gilgamesh's distress at Enkidu's death, and his quest for immortality.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
In order to learn the secret of eternal life, Gilgamesh undertakes a long and perilous journey.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
He learns that "The life that you are seeking you will never find.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
When the gods created man they allotted to him death, but life they retained in their own keeping."
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
This quote was originally attributed to Siduri in the Old Babylonian version of the epic, and then attributed to the immortal flood hero Utnapishtim in the Akkadian version of the epic.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
Nevertheless, Gilgamesh's fame lived on after his death, because of his great building projects, and his account of what Utnapishtim told him happened during the flood.
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Q916
how does gilgamesh consequently view his immortality
Epic of Gilgamesh
The story has been translated into many different languages, and Gilgamesh has since become adapted in works of popular fiction .
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
A eukaryote ( or ) is an organism whose cells contain complex structures enclosed within membranes .
00
Q918
how many eukaryotic cells are in a animal?
Eukaryote
Eukaryotes may more formally be referred to as the taxon Eukarya or Eukaryota.
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
The defining membrane-bound structure that sets eukaryotic cells apart from prokaryotic cells is the nucleus , or nuclear envelope , within which the genetic material is carried.
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
The presence of a nucleus gives eukaryotes their name, which comes from the Greek (eu, "good") and (karyon, "nut" or "kernel").
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
Most eukaryotic cells also contain other membrane-bound organelles such as mitochondria , chloroplasts and the Golgi apparatus .
00
Q918
how many eukaryotic cells are in a animal?
Eukaryote
All large complex organisms are eukaryotes, including animals , plants and fungi .
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
The group also includes many unicellular organisms .
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
Cell division in eukaryotes is different from that in organisms without a nucleus ( Prokaryote ).
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
It involves separating the duplicated chromosomes , through movements directed by microtubules.
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
There are two types of division processes.
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
In mitosis , one cell divides to produce two genetically identical cells.
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
In meiosis , which is required in sexual reproduction , one diploid cell (having two instances of each chromosome, one from each parent) undergoes recombination of each pair of parental chromosomes, and then two stages of cell division, resulting in four haploid cells ( gametes ).
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
Each gamete has just one complement of chromosomes, each a unique mix of the corresponding pair of parental chromosomes.
00
Q918
how many eukaryotic cells are in a animal?
Eukaryote
Eukaryota appears to be monophyletic , and so makes up one of the three domains of life.
00
Q918
how many eukaryotic cells are in a animal?
Eukaryote
The two other domains, Bacteria and Archaea , are prokaryotes and have none of the above features.
00
Q918
how many eukaryotic cells are in a animal?
Eukaryote
Eukaryotes represent a tiny minority of all living things; even in a human body there are 10 times more microbes than human cells.
00
Q918
how many eukaryotic cells are in a animal?
Eukaryote
However, due to their much larger size their collective worldwide biomass is estimated at about equal to that of prokaryotes.
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Q918
how many eukaryotic cells are in a animal?
Eukaryote
They are considered to have first developed approximately 1.6–2.1 billion years ago.
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