Evolution, Morphology and Exobiology

http://en.wikipedia.org/wiki/Cro-Magnon also what was there blood type and halopgroup. please provide links and references. someone must know

This is a little old, but it's got lots of potential. A step closer to putting together a picture that works. http://www.wired.com...replicatingrna/

Hello probable human. I want to know where virus came from.

hello every body. first a little presentation of myself...i am a young entomologist from Algeria, i am 20 years old...and i hope to be a big biologist in future if God wants that...please if i make mistakes in my English please correct me. in my little experience with insects i have observed that there is a real deal with the theory of evolution. but what i don't understand is how the hell, human descend from a primate even if the primate possess 46 pair of chromosomes and human only 23 pairs!!... could we make a new evolution to human body to a primate now in this time?!!...i think it is impossible...so why the hell did us say and "prove" with stupidity that humans de…

I would like to know when the newest human genes made an appearence. There are only certain population groupes with this gene. Thanks johana.

Evolution of Species including human race is consequence of mutations. Mutations are consequence of improper replications. Well, the question is the mutations are just accidental or they are made intentionally by the speices to make themselves as "The Fittest"?

Something I've been wondering about a lot as of late is evolutionary of viruses. In particular, I'm interested in the rabies virus. It would appear that it has been around a long time, and since Louis Pasteur created the vaccine, there have been less cases. However, I question the possibility of a rabies revival. Would it be possible for the rabies virus to evolve and become an epidemic issue again? Should this be considered like the smallpox virus? In other words, once eradicated and widespread vaccinations, then it should become obsolete?

Is it possible for an organism to not be seen in visible light, and only seen in like, infrared?

I would like to know wether anybody knows of trees that lay down over a uge area all in the same direction. Did they perhaps did carbon dating on them, because of the cold it could have happened long ago. Thanks johana.

Hi everyone, I'm an engineer who enjoys philosophy and science but nevertheless forgot a lot of things about evolution. Recently I had a long discussion with my friends and came up with questions of which I can't answers on the internet and textbooks. 1. Are we still evolving (obviously it should be so)? But what is the evidence that we have been evolving in the last...say 500 years and what are these changes? Any legit reference? 2. Can external conditions cause genes to change? If yes, why parents with unaligned teeth who wear braces will still have kids with unaligned teeth? If no, then how do species evolve in the first place? 3. People have different ski…

OK, I'm pretty sure many of you have heard about the bacteria discovered by NASA which is allegedly able to incorporate arsenic into its DNA in place of phosphorous. I cannot for the life of me understand why this claim is proving so difficult to prove or disprove. I mean I've got a Biotechnology diploma from college and am currently working on my Undergrad in Microbiology at the University of Guelph, so I know about various DNA-probing techniques. However it strikes me that the easiest method to definitively prove (or disprove) that the bacterium incorporates arsenic into its DNA would be to grow a sample of the bacterium in an environment starved of phosphorous and …

Okay, so I've noticed that when I make TSA, and after I've sterilized, and after storage at 60 degrees Celsius, that there is this white stuff that forms after it's been sitting for a day or so. And I plated the TSA this time to see if there would be any growth, and there was. Does anyone have a suggestion as to why? I've sterilized it before storing it, so why would there be any growth?

About 50 years ago, during drought conditions here in New England, I happened to catch sight of a dense column of ants maybe two feet wide and some 35 feet long was marching East across my side yard. Leading the column was a near perfect circle about a meter across, defined by slightly different ants that traveled as though contained by a moving circular boundary. As each ant reached that boundary at some certain angle, it snapped into an equal angle away from the circle. They might always have all been always been turning to their right. They raced around and around with those segments of travel, swinging around in their headings even into reverse direction. In disb…

Most male fish spread their sperm over female eggs just because they have come into proximity with the eggs. The female may even have departed, and there is no contact with her. So what is it about just seeing (or tasting?) the female eggs spread out before him that induces the male fish to produce sperm? Does he experience something like sexual excitation or is his sperm spreading just a deliberate act induced by seeing the eggs?

I am curious and the information I find is conflicting. Do fungus-like protists have a chitin (or other polysaccharide-based) cell wall? Thanks all!

Trying to make do with what I have here in the lab...can K. pneumoniae grow and be sustained in a litmus milk? Or is that more just for testing. I don't have the exact agars to grow it on and am just trying to see what I can grow it on with the things I do have. We have to use it for a capsule staining lab, and then we'll need it again for gram staining next week. So just wondering the best way to preserve it until next week.

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Evolution by natural selection has been effective at producing increasinlgy more complex creatures. However, humans may now be able to continue evolving by means other than natural selection, which, let's face it, is a very slow process. We can now evolve via a developmental singularity process which means that more intellectual sophistication will be achieved quicker, and more efficiently, in the same individual. The consequence of this is that death by ageing will become unecessary. For full reasons and a discussion see here: https://acrobat.com/#d=MAgyT1rkdwono-lQL6thBQ

Trilobites, from c.525 Mya, look like 'derived forms' of Praecambridium sigillum & Skania, from c.40 Myr before. Indeed, the former looks like it had three armored lobes. If so, then 'proto-Arthropods' can be identified, in the Ediacaran period. Is this 'obviously false' ?? Fig. 1 -- Praecambridium sigillum Fig. 2 -- Skania fragilis Fig. 3 -- Trilobites

Hi, I'm hoping to do something a little simple, maybe it's only at the high-school standard, in regards to: a: How and from-where information enters our brain, from the outside world.(that is; from our 5 senses) b: How and where in the brain information is dealt with or processes. c: How and from where information leaves the brain, to enter the outside world. eg: speech, facial expressions and other physical actions. I'm just going to post things and hope some body can correct any mistakes that they see. I'll start with a: and then do c: and lastly do b: I'm just doing this for a bit of fun and to get some idea as to what happens in our brain. I what to do…

Does anyone know whether or not the skulls of predators such as lions or bears are much thicker than those of humans? For example; could a lion or a bear survive a well-placed blow to the head from an aluminum baseball bat? I know such a bat could crush a human skull like a watermelon, but would the same apply to most predators? Assuming you could avoid the claws, could you kill or at least incapacitate a lion or grizzly with a bat?

Hi What is the colour of an adult Emperor penguin's skin? I found a reference which indicates the chicks have gray skin, although I am not certain that this pigmentation is maintain until adulthood. Emperor Penguins When they hatch the chick has gray skin and no feathers and is totally dependent on the adults for warmth. Their gray down fills in over the course of a few weeks with a black crown that extends from their bill to the back of their head and the sides of their neck, with white cheeks and chin. As the chick grows, the black pattern extends to their entire back. When immature, emperors are gray-blue while the adults are black, and their auri…

I was just wondering, how does the brain when it receives signals from the senses about the body, how does it give us the ability to determine where those signals are coming from? for example how do we determine that when we experience pain it is coming from our finger other than seeing it, how does the brain interpret where these signals are coming from for us then?

I've been reading about small animals with nervous systems. I've read that tardigrades can be microscopic while rotifers are close to microscopic. Surely, I need some say in a scale, but I don't have one. Nonetheless, I've been attempting to figure out which organism can be the most miniscule and yet possess a simple nervous system for somatic interaction with its environment. Which can be simpler and smaller: Rotifer or Tardigrade?

Hi all! I'm a lab tech for a microbiology lab, and it's been a little while since I've done microbio. So just a quick question I had, when you autoclave TSB in the test tubes, do you put a cap on it? or no? Just wondering if one way works better than the other. Thanks!