Biology

Check this out: a "how to" make a usb microscope from one old webcam.... great for kids... http://www.metacafe.com/watch/977880/make_a_cheap_usb_microscope/

Cryogenics, the sceince of freezing people who are dead until they are brought back to life, is impossible. The problem with it is that the water inside people's cells would simply freeze and break the cell memberane, which would cause death on reviving. This means that it is impossible. If anyone can find a way around this please do so.

say me whether one travelling thro a worm hole arrives at future.

I have an exam on Monday and need to find out a good answer to the following question, it is second year University level.. You have found a species of moluscs that vary morphologically within its' population and between its population. Nothing is known about the biochemistry or DNA variations. Design a set of experiments to determine the relative importance of natural selection and genetic drift in influencing variations. Any help would be greatly appreciated! Thnks

If parents are normal and have 4 children inwhich 2 are normal but 2 children are infected. What kind of genotype does the parents have, i mean how is it that normal parents have infected children "/ ?

When somebody is studying the phenomenon of viruses ,he can see that when viruses are not coming in contact with a host organism, they are a sum of chemical compounds that not fulfill the criteria to be considered as life.While on the other hand they start reacting with a host, or in other words they start making chemical reactions with the compounds of the host,they become alive.The same thing happen with prions ,which are proteinaceous compounds that while they react with proteins of the host, they become alive in a way... Lets hypothesize that we make the hypothesis that:No living organism is possible to remain unchanged structurally.Lets hypothesize that this…

Diabetes is very common nowadays and doctors and scientists are trying to get rid of it. I am ten years old and I have diabetes but it is not so bad. I've only had it for 1 year and a half so I'm not exactly accustomned to it. There is now a needle-free injection I tried it but I think it is quite confusing. If you have diabetes or want to know more, reply!

Is the process of human physical growth a steady, regular pattern thru all stages of development; or is it more acurately described as a process of starts and stops? I remember reading somewhere about growth spurts of like a couple of inches practically overnight. Is that typical for the growth process per se? Do plants grow in spurts? How about the growth process of biological organisms overall? Slow and steady, or bursts?

What pH level would be the best to grow yeasts?(if the yeasts are just normal Fleischmann's Yeast) :confused: Oh and btw by pH level, i also want to know if it likes more basic or acidic environment.

http://news.bbc.co.uk/1/hi/health/7354458.stm This story is like science fiction! We should be able to grow limbs for sure in the future! What do you think?

It seems that our intelligence started out from sensory processing (especially sight) and our internal communications system (neurons). In fact, that seems to be a common theme among animals, where animals with good eyesight like octopi and birds are quite intelligent, and that intelligence is based on the internal communication system (nervous system). But is that the only way intelligence might have evolved? We have other forms of internal communication, for example. Hormones, for one, though these have way too low a bandwidth to be a basis for intelligence. On the other hand, we have very complex immune systems, that seem to have some ability to communicate with it…

In another thread we started discussing the impact of agri-chemicals on human health and the environment. This is a subject that needs its own thread. I have titled it 'chemophobia' after the often irrational fears many parts of society have of chemicals. There are several questions here. 1. Are agri-chemicals a net benefit or detrement? 2. Are they over used? 3. Is organic farming any better? 4. What about chemicals in industry and in the home? 5. What about chemicals of a more 'natural' source? 6. Where is the main benefit and where is the main harm from chemicals? 7. What changes should be made? 8. Should we be afraid? Comments?

Hi, I'm investigating using methylene blue (redox indicator) and I am aware that in the precense of bacteria it decolorises as it is reduced. However, what specifically causes the indicator to reduce? Is it related to bacteria cell structure? Regards

sometimes i wonder if our perception of animal intelligence in species other than chimps and simliar primates is limited because in general animals lack complex communication and dexterity. both are crucial for displaying intelligence to us human observers, given that these are our standards, besides having bigger brains of course. but does a lack of complex communication and dexterity, or either, indicate a LACK of intelligence? or could it be that they are intelligent, but we simply can't tell because of the language/dexterity barrier? is there a way that we can measure absolute intelligence in animals? also i was wondering if anyone knows any good books on the sub…

What is the name of the enoyl-acyl carrier-protein reductase (ENR) substrate? ENR is an enzyme used for fatty acid synthesis Thanks

Nostrils, why two? Why do humans, and many other animals, have two nostrils? I’d think that one large one would have been more efficient.

Hi, I couldn't find a more approproate section but I'm a student at UCLA who decided to launch sciencerate.com where sicentists posts articles from journals and others comment/rate them. I was given the idea that we cna integrate PubMed into it where users just paste the pubMed ID and the rest will get filled out. THe problem is that it's not eacy to do, does anyone else think that would be a good idea? Or any other suggestiones?

Does anyone have experience with blocking IL-6 in vivo? thanks a lot.

My son is in the 4th grade this year and doing a science project. We were thinking of doing the expierment where you grow bacteria from a dogs mouth, and then from a humans mouth to see which one has more bacteria in it. Anyone have any ideas, how to help make this a success. DO i need AGAR, or can i make it myself? Thanks alot to all who reply!

Does anyone know anything about HLA paternity tests?

These animals/insects are able of traveling on water, why aren't other reptiles/insects able to do the same?

What is it that will make one animal live longer than another. I am more focused on the deterioration of the bodies functions than any outside variables such as predators, unhealthy diet, lack of medical care. Why do some mammal's that weigh around the same as us die off in captivity much sooner than we do? Even under great care. How come smaller animals such as cats or dogs go through a faster life cycle? Thanks!

I am doing a biology project on the endoplasmic reticulum; it is on power point and I need some awesome pictures of the organelle. And, when I mean awesome I mean 21st century stuff or if that's too difficult just any clear pictures will do. Does anyone know where I can get some awesome pictures of them? All help is appreciated!!!

Are viruses alive? Consider the following: Living things -Use energy (food) -Move on their own -Reproduce on their own -Exchange gases (breathing) -Respond to stimuli -Grow -Make waste Viruses can respond to stimuli (hijacking a cell) and kind of reproduce by forcing the cell to do it, but now on their own. Some scientists say they are alive, some say they can't be because they don't fit all the criteria. What's your view?

So i did a laboration in my environmental sciences class, what i did was measure zinc and cadmium levels in ecologically and non-ecoligally grown spanish tomatoes. My problem is the conclusion of it all. There is more zinc in the ecological tomatoes, but with cadmium is the complete opposite. The ecological ones have 0. And the cadmium in the non-ecological tomato is still low, it is very hard to know if it depends on merely the geographic location (natural soil variations) or is it because of the use of fertilizer? Here are the numbers btw, in dry weight: Zn in normal tomato: 0.00056 mg/kg Zn in eco-tomato: 0.0001206 mg/kg (almost double) Cd in normal tomato:…