New answers tagged zoology
In their active forms, various proteins have post-translational modifications (i.e. glycosylation) which are difficult to reproduce in bacteria. This is the rationale for the choice of higher organisms as the producing source. Mammalian cell lines are easier to generate and maintain but suffer from genetic and epigenetic instability (the transgene can be ...
In most marsupials, only the females have a pouch. However, males of the water opossum and the extinct tasmanian tiger (or thylacine) also have a pouch. The males of both the thylacine and water opposum used/use their pouch to keep their genitalia from getting entangled in vegetation.
If you're referring to keeping geckos as pets, like all reptiles, amphibians and birds, they come with a small but finite risk of contracting salmonellosis. Having said this, the infection is easy to avoid if you maintain basic hygiene. On a personal note, I know dozens (perhaps hundreds) of people who keep or have kept reptiles as pets and have yet to ...
I used Zoology by Miller and Harley in my undergraduate years and I found it to be an engaging, informative text book.
I live in Japan and here they are called "gejigeji". As mentioned, they are a member of the centipede family and are as creepy as hell. I live in a newly-built house, so thankfully there are no cockroaches, but every now and again one of these little blighters will scurry across my floor in my peripheral vision and scare the bejesus out of me. They are not ...
ATryn is a human antithrombin produced in the milk of transgenic goats by GTC Biotherapeutics. It has FDA approval and I believe that it is available for prescription in the USA. Added later, after the emphasis of the question changed somewhat. Proteins produced in a mammalian system are more likely to have post-translational modifications that are much ...
It's a type of centipede. Based on the long legs, I would bet on something like that: http://en.wikipedia.org/wiki/Scutigera_coleoptrata Or at least a Scutigeromorpha http://en.wikipedia.org/wiki/Scutigeromorpha#Scutigeromorpha
The mechanisms of osmoregulation is different for sharks (and other elasmobranch fishes) and teleost fishes. In Elasmobranchs the body osmolarity is maintained equal to the seawater by Na⁺ Cl⁻ and urea. Toxicity because of high concentrations of urea (strong chaotrope) is counteracted by high levels of trimethylamine oxide (TMAO). So, the elasmobranchs do ...
I've been told it is the marsupial 'Myrmecobius fasciatus' commonly known as the numbat. http://en.wikipedia.org/wiki/Numbat
I saw that some big dinosaurs got a second neuron group near their back legs to overcome some nerves signal delay problems. Not sure about that.
There is a list of "vital organs" on which there is a consensus that if such organs are removed, the body dies within hours/minutes. Yet people can live long with only one lung or one kidney. Another list could include other organs that are semi-vital: we could live for a relatively long period without them, but their absence has to be compensated with a ...
You can't remove most organs. The heart, lungs and brain are the ones that without you'll die in seconds. The rest you'll live a few hours or more. All depends how long you wish to live. The best way to see which organs are most required is to look at the order organs are shut down when there isn't enough oxygen or blood. That tells you which area most and ...
There are various parameters that describe change of seasons such as day length, temperature, humidity. But it can be assumed that most of these parameters ultimately depend on one parameter- day length. The response of plants towards the length of day/night cycle is called photoperiodism (which dictates spring flowering). This article explains the effect ...
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