Biology

I am sorry but i am noob in this matter. My dad asked me to look for this, so i am doing it. What he said is "As mouse is a hermaphrodite animal, so it represents characteristics of both male and female, so it should be able to produce babies and also mate so that the other mouse will produce babies. If that's the case, then how do they do it, i mean what's the actual process?" . I hope i am clear. Thank you for your time.

How are ribosomes formed in prokaryotes (particularly in bacteria) which lack a nucleolus?

I have become really fascinated with natural parthenogenesis in animals like komodo dragons and sharks. I haven't been able to find any television specials or programmes on it, so I'm just wondering if there are even any out there. I mean, how could there not be? It's so cool! I have also found that very little people know about parthenogenesis. It was never mentioned in my high school biology classes; I only chanced upon it while surfing the internet. Again, I find this curious because it is such an interesting topic. Please give me your thoughts.

Hello all, this is my first post on the board. I was wondering if somebody could give me a couple pointers. I'm extremely interested in the human genome - what information does it contain, how do you extract that information, and how useful is that information once you have it. I view this as an exciting "frontier" of science, and I'm considering pursuing a career in this subject. For someone who has taken general chemistry and organic chemistry undergraduate courses, what classes/curriculum would you recommend taking in order to gain a deeper understanding of genomics and bioinformatics? In other words, what does the "bridge" look like from taking those two chemi…

My cousin who i grew up with since diapers is gay. He was born like it, i could give you evidence but at the end of the day your gonna believe what you do right now. I'm sure some people do it by choice but in my cousins case he was born that way. Anyways what scientific reason causes people to be gay? Is it in our genetics? Why would that happen if so? Just on a hunch, could the skyrocketing human population be causing this? Natures way of population control? Then again I guess being gay has been around since biblical times before the population was ever one billion. That was just an idea and its wrong, but you get the point. I want to hear any …

One of the major toxins in bracken (particularly the fronds) is ptaquiloside, which is known to be very carcinogenic. Doing a lot of woodland work, I spend a lot of time handling bracken, and often end up with the juice from the fronds on the skin of my hands. I'm not particularly bothered by this, but it got me wondering, does this mean I run an increased risk of getting skin cancer on my hands? And, should I be more worried (and therefore take safety precautions)?

We all know after an animal dies in a natural environment (eg the forest), the process of decomposition sets in and within 2 weeks to months, most of the flesh will be broken down and returned back to earth. But what about the harder and more sturdy parts of the animal like its bones and teeth (even beaks of birds)? If it takes a very longer time for it to decompose, and given that many animals die everyday, shouldn't we expect to find many of such parts piled up in the forest? But the fact is we don't readily find them, so what happens to them?

The human body uses signals from the brain to send signals to the rest of the body and throughout the brain to make the body useful for activities and other tasks we do daily. The brain can be recorded to copying and record signals with devices attached to the head and body, then recorded so the type of signal can be analysed to rebroadcast signals to the body by electronic equiptment. This research has been underway recently, and once they understand it more they will be able to send wireless signals to the brain, including others thoughts spoken to ones self, which will be able to be shown by scanning devices wireless and rebroadcasted as if it was sent by the persons…

So far we have conducted genetic experiments on plants and animals, what will happen when you start experimenting with humans? When we will have the first "clone" human? When we will have the first human genetically perfected? When we will have the first hybrid beings? I think that genetic engineering may be the end of the human race as it is now. The current races of animals are the result of a slow evolution through millions of years. When we have the power to manipulate genetically beings, we can make changes of species in a short time. Generating species evoloción never appear in a natural. Much is said about dangers of nuclear , "en…

What makes someone a genius? Anyone know? I don't. Contradiction

There's this yellow area in the arctic that they say could lead to possible life forms close to Jupiter.

Hello Assuming a completely sealed garage of the size 5 x 5 x 3 m --> 75m3 or 160.72cubicfeet.The activity level of the person should be stated. Daily : 3 consecutive hours of anaerobic exercise --> lifting / 2 consecutive hours of anaerobic exercise --> lifting / 1h30 of aerobic exercise(i.e boxing) / 9 hours sleep. ( Total : 5 hours anaerobic exercise + 1h30 aerobic exercice + 2 hours at rest + 9 hours sleep)Part of the garage door can be opened(1.50 x 2 m), giving on a parking lot, and there is a big entrance giving on the outside air on the same floor several meters away.(about 5 x 5 m) There are very few cars that ever go through this parking lot.(2-…

OK I'm just going to put this out there and see what you guys think. It may be that my physiology is somehow unique and that this is why my body responds this way, so I can't gurantee repeatability in all cases. Anyway, I've always puzzled on how or where to broach this topic, but I admit that since being a young man I have occasionally (although quite frequently) used aspirin as an aphrodisiac. (And no I don't mean by giving it to my wife!) Through a chance discovery I found that taking a 75 milligram dose of aspirin several hours before sex massively increased the intensity of one's orgasm. To be clear it has a slightly differer impact on me than what traditional ap…

Hi Everyone! Does ANYONE have a link to a chart or happen to know the shelf-life of various prepared media? I work in a micro lab, and sometimes like to make plates before I'll need it (even months) I'm aware that TSA, TSB, NUTRIENT AGAR AND NUTRIENT BROTH all have a prepared medium life span of 6months+, however what about the following media: -Spirit Blue Agar -MacConkey -Hektoen -Mannitol Salt Agar -Urea Broth Thanks a Bunch, Jasmine

do virus contain vitamins and minerals?

what came first....the chicken or the egg?

Hello, hopefully someone here can help me. I had a discussion with my collegue about this following topic: If all bald men stopped having babies, would the bald men eventually die out or be noticably diminished? How many generations would it take? I know women also can pass down the bald-gene but wouldnt it be fewer of them also?

I see that neonicotinoids are getting much of the blame for crashing honeybee populations. Originally, they were touted as a safer alternative to organophosphate insecticides. Can anyone help me out as to the molecular mode of action for neonicotinoids and the biological activity and environmental persistence of neonicotinoid metabolic products?

Quick, presumably basic question regarding the evolution of a specific species. Why is grass still grass? (and by the same token a single cell organism still single celled organism) Because amirite in presuming the latter in the evolution scale almost inevitably replaces its source. If grass was to evolve and survive why are there no jumanji style things alive?

Hi, I saw this type of experiment on the net, and I don't get a few points. I'm talking about the experiment where you lyse a sample (peas, meat, etc) with a blender, then add detergent and salty water, and finally add alcohol to the mix to precipitate the DNA. What I don't quite get about this experiment is how can alcohol (ethanol) and water form two phases, since ethanol is soluble in water. I think maybe is because the water molecules are solvating the salt and the detergent. Also, in the case of plant cells, I'm not really sure how can detergent break the cell walls. Last, how can salt help precipitate DNA? I know that DNA is negatively charged, it occurs to me t…

First a quick question: How do gut bacteria end up in your gut? Sounds maybe like a silly question, but I always learned that your stomach (or rather the acid in it) is able to sterilize a lot of food, isn't it? So, how do these bacteria get in your gut? Wikipedia suggests it's (also?) orally. Since up to 60% (wt) of the dry mass of feces (*) can be made up of these gut bacteria, which suggests that they grow rather quickly, and therefore must consume quite a bit of food, what do humans have to gain from it? Wikipedia suggests a whole list of useful functions... but somehow it still seems like the bacteria get the better deal here. It reads like a hijack: without the…

Easily the best side benefit to being a scientist is going on fieldwork. As a request to another thread I'm throwing up a field trip report thread to post photos/war stories and reports on fieldwork anyone would like to share. I was recently in the Osa Peninsula region of Costa Rica - nominally looking at amphibian declines post chytrid fungus. The Osa is one of, if not the most biodiverse places on the planet, and well worth a visit for any reason. I took some very (very) amateur photos of some of the critters we saw and am posting up on request. The herpetological bias is unapologetic . Feel very free to put mine to shame, and if people would like I have photo sets…

questionsfor digestion and urinary tract 1.Which of the following will increase acid secretion in the stomach? A)Aspirin B)Proton pump blocker C)Gastrin D)All of the above E)Only A and C above . http://biology.about.com/library/organs/bldigeststomach3.htm 2.Resistin: A)Secretion is increased in Type II diabetes due to excess fat accumulation B)Decreases insulin signaling in muscle and other tissues C)Causes insulin to bind tighter to the insulin receptor D)All of the above E)Only A and B above http://www.med.upenn.edu/lazarlab/Pubs_pdf/Banerjee_JMM_03.pdf 3.Crohn’s …

I add some new pictures in my theory, i think my theory really can unlock the mystery of cause of intersex. Every case of intersex people found are all in my table 3 and table 4. No other one case of intersex you can found not in my tables. I hope you can check this article clearly. then we talk about it here. if you can see the pictures, you can check them on my blog. http://orgasmgirl.blogspot.com/2011/...ccurrence.html 1 Definition of intersex Intersex, in humans and other animals, is the presence of intermediate or atypical combinations of physical features that usually distinguish female from male. It has 4 cases . 1.1Female pseudohermaphroditism …

The role of Hormone in Sex determination and differentiation if you can't see the pictures, you can see my full article here The role of Hormone in Sex determination and differentiation http://orgasmgirl.bl...ermination.html Sex hormone is another thorny issue in my theory system. Here firstly I want to claim that intersexuality, transgender, homosexuality and shemale are totally different conception in nature. Intersexuality is identified as ambiguous genitals, commonly has a large clitoris or small penis. The reason is that crossing-over partial occurrence between X and Y chromosomes during father's meiosis period then lead his offs…