Biology

Do any of you guys know any good websites to find a detail explanation of how human beings evolved.

Hey whats going on guys im studying for my final exam and im stuck on the concept of polymerase chain reactions. Would any of you guys be able to tell me what they are and why they are so important. Thanks in advance

What does BSE (Bovine Spongiform Encephalopaty) greatly differ from regular TSE (Transmissible Spongiform Encephalopaty)? What makes it such a sucessful virus?

Okay, I understand (basically) how sweating works. Your sweat glands, when you're hot, produce sweat and the sweat evaporates taking heat energy away, therefore cooling you off. A question I had was if you were submerged in water but still above the temperature that causes you to sweat, would you sweat underwater?

Hi.... I’m trying to wonder what’s the defence between a Hydrogen Bond and a Covalent bond (a polar covalent bond to be exact). Other than hydrogen is so special that it gets it’s own name, even though it’s the same as a polar covalent bond (in theory). I know it ends up being a tenth less stronger than a regular covalent bond, but still? So am I missing anything? Any suggestions, comments or opinions are appreciated... Thank you in advance....

I want to get into science and computer programming in college. I know physics has lots of math in and so do some parts of chemistry, but what about biology. I would like to look at biology, but I don't know what parts of biology to look are there any that have to do with a lot of mathmatics. Thank you for all answers.

I am fascinated by the possibility of storage of memory in neurons. Where could it be stored? Is it a system of layers of epigenetic switches or is it stored in some other way? Any ideas please?

hmm?

I have heard that einstein's brain is different from others .Is it true???What make a man to think more???

Is there a predisposition for your characteristics which is hard-wired into your genes? From studying twins there seems to be a genetic link for certain aspects of personality including the degree to which a person is an extrovert etc... However, is there a Gay gene? If there is then heterosexual people can be as guilty as racists if they show 'homophobia'. However, if being gay is purely a lifestyle choice then it is on a different ethical platform. Scientists appear to consider that there is no Gay Gene: http://http://www.lifesitenews.com/ldn/2007/mar/07032003.html I wonder what others think on this subject.

He did this experiment to mimic the conditions around volcanos during the age of pre-cellular life. What he did not know at the time that he did the experiments was just how supportive it was of his theories, because back then, he did not have access to high-performance chromatography. Hence, it was pushed out of view and forgotten about, in favor of his most famous experiment with Urey. However, upon reexamination by the heir to his works, "they found no fewer than 22 amino acids, several of which were never seen by Miller in a lifetime of primordial modeling." http://blog.wired.com/wiredscience/2008/10/forgotten-exper.html?npu=1&mbid=yhp http://www.sciencema…

This is just a general question, sorry if the answer is simple, I'm kind of new to this stuff. When Miller and Urey tried to create life in the lab, it is often said that they did not use oxygen, but one of the gases they used was water vapor. Would water vapor not include oxygen, or would the oxygen not oxidize their product since it was tied to the hydrogen. If someone could explain this to me in some simple language I would appreciate it very much, thank you.

Hi all I am working on science fair, which is due Monday. My teacher will not allow us to use anything in the classroom for some reason, including test tubes, cylinders, and petri dishes. So, instead, I came up with the idea to use..... plastic Tupperware. I am growing bacteria. I know that in order for it to grow, the dish needs a media. Petri Dishes usually have the gelatin media already in it. Is there a substitute media I can make here at home to put in the plastic Tupperware? Thanks for your assistance! ~Danny

Hey whats goin on guys im pretty new to the forums I just ran into this problem during my general bio homework and my professore really didnt give me that good of an explanation so here goes. Why are atoms unlikely to react when they have their outer shell filled with electrons? thanks in advance guys

Why do we call ourselves human beings? we do not call dogs 'dog beings' or cats 'cat beings', so why do we call ourselves human beings?

Ageing (from wiki): Why do organisms age (wiki again): Recent scientific discoveries are however challenging this understanding of ageing. Prevailing Theory Of Aging Challenged: Genetic Instructions Found To Drive Aging In Worms If ageing is pre-programmed, it should theoretically be possible to reprogram genetic software to make you live longer. All the software is there to make you live for longer, the trick is now to discover which signaling pathways need to be tweaked and how to manipulate these pathways.

A while back I observed a hawk with a Indian myna bird in it’s clutches. 3 more Indian myna birds appeared abruptly and started squawking and pecking at the hawk. This group harassment was effective enough after a few seconds (4 or 5) to make the Hawk, which was about twice their size, release the bird it had in its claws. As the Hawk flew away the Indian myna flew after it squawking and pecking as they went until the hawk completely left the scene. The Indian mynas appeared to aggressively defend their own kind in the face of a very capable opponent. Is this a common occurrence with Indian myna? Or in fact any bird that is smaller than the bird of prey? http://e…

1st sorry for my english, if there are mistakes... I have an idea in my mind and I would like to ask you people, who understand science more than me, what do you think of it: So we separate living world and non-living world (saying non-living I mean stones, water and so etc.). The living world has one very specific thing in itself. It is, let's call it force that make it survive. In organisms this is called 'an instinct of self-preservation'. What is this force? In my oppinion this is a natural force that existed even before the life(what we understand of it) appeared. If this is so, it means that life is just a manifestation of this force. This force I suggest…

The best of all site is our www.scienceforums.net The other sites are Wikipedia http://en.wikipedia.org/wiki/Biology Biology site http://biology.about.com/ A project on biology http://www.biology.arizona.edu/ Biology in yahoo http://dir.yahoo.com/Science/Biology/ Another biology site http://www.dmoz.org/Science/Biology/ Lifescience biology http://www.biology-online.org/ Biology site http://www.biology.com/ Biology in google http://www.google.com/Top/Science/Biology/ Human biology Human genetics http://www.google.co.in/aclk?sa=L&ai=BChe1T8TsSMbMAY-y7AOf3biSDYXsgw-t4uj9AanCmoMH4M…

I am new to this forum, but wanted some thoughts on endosymbiosis. Does anyone here have any real objection to the theory? Honestly, I find it to be a very great idea.

Preadaptations (aka exaptations) are features that perform a function but was not produced by natural selection for its current use. The word "preadaptation" was co-opted () into "exaptation", however Daniel Dennett denies exaptation differs from preadaptation. A simple example of a preadaptation is a feather that evolved (through natural selection) for warmth and was coopted into a new function, flight. The genomes of various ancient organisms have been sequenced and it is interesting to view the presence of several preadaptations in the genomes of these creatures. The purpose of this thread is to highlight several of these interesting findings. If anyone come across…

Are betalains considered as flavonoids

Hello everyone: Could someone please show me how to answer this question mathematically and correctly? I guessed the correct answer. Thank you. --- 1. When glucose -> CO2 + H2O during aerobic respiration, more than 60% of its energy is released as: a) oxygen b) carbon dioxide c) heat d) ATP e) NAD+ Correct answer: [hide]c) heat[/hide]

Would it be possible to cultivate Clostridium Botulinum from common soil? I understand that it grows in an anarobic system. Would soil suspended in Canola Oil be put into a centrifuge to seperate Botulinum from organic matter? And in what enviroment does it grow the best in?

Does anybody have an idea about what 'group diffusion' is..? it is in relation with the transport mechanism in a plant cell (most probably)..and may have something to do with the entry and exit of 'glucose' in the cell..! do reply!