Biology - March 2007

2007-03-20 02:45:25 · 3 answers · asked by jessica_stay 1

a. Molecules like DNA and RNA formed and later reproduced themselves.
b. Protobionts formed, followed by prokaryotic cells.
c. Complex molecules were produced when the Sun provided enough energy.
d. Simple compounds existed in Earth's early oceans and hot springs.

2007-03-20 02:38:31 · 4 answers · asked by jessica_stay 1

In my test earlier, there were 4 blanks, I only know the SA node as a pacemaker... thanks

2007-03-20 02:29:30 · 1 answers · asked by student 2

a. Mate selection
b. Genetic isolation through polyploidy
c. Physical isolation of populations
d. Adaptive isolation due to competition

2007-03-20 02:07:13 · 3 answers · asked by jessica_stay 1

Please no anti-drugs bs. I don't do cocaine anymore. I went into rehab 2 years ago and have been clean since. I just want to settle this arguement me and my friend are having (she does coke so you can tell her off if you want). So, is the numbing quality of a batch of coke indicative of it's purity? Is it directly proportional to it's purity? 10 points for most informative answer. Thanks

2007-03-20 01:56:57 · 4 answers · asked by Anonymous

Is it possible for a guy with O+ blood, and a lady with A+ blood to have a child with AB+ blood? Please give a website or book.

2007-03-20 01:51:43 · 6 answers · asked by Christian #3412 5

2007-03-20 01:48:06 · 3 answers · asked by shiela mae a 1

Inside the "shell", there is a soft-bodied insect. Apparently it matures to be something like a moth. But whilst it is soft-bodied, it crawls around being protected inside this "shell" it stitched for itself. Interestingly, each "shell" is unique. Do you know the name of this insect?

2007-03-20 01:26:38 · 1 answers · asked by Lilliana 5

2007-03-20 00:56:14 · 11 answers · asked by scorpe_2000 2

i was taught it is blue but untill recently i have been told it is red what is it and why is it that color?

2007-03-20 00:54:38 · 17 answers · asked by bob 2

2007-03-20 00:10:57 · 3 answers · asked by i-sena 1

tidal volume(TV)=500m,rate of breathingl=12breaths/min,inspi... reserve volume(IRV)=3100ml.expiratory reserve volume(ERV)=1200ml,residualvol... (RV)=1200ml,air in the anatomical dead space=150ml,how do i find vital capacity(VC),inspiratory capacity(IC),functional residual capacity(FRC)?

2007-03-20 00:04:26 · 2 answers · asked by jess2luvmuacks 2

2007-03-19 23:57:45 · 5 answers · asked by wizard bob 4

2007-03-19 23:47:45 · 6 answers · asked by guia 1

2007-03-19 23:47:04 · 8 answers · asked by Anonymous

im so sorry...further request to qns asked jux now...i also need to find vital capacity(VC),inspiratory capacity(IC),and functional residual capacity(FRC)...thks alotxx...

2007-03-19 23:19:09 · 2 answers · asked by jess2luvmuacks 2

2007-03-19 23:13:05 · 2 answers · asked by Lai Yu Zeng 4

I mean General Bacteria as the bacteria most commonly found on your hands, bench tops etc.

2007-03-19 23:02:32 · 4 answers · asked by Anonymous

According to these sites (http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Protists.html and http://www.estrellamountain.edu/faculty/farabee/biobk/BioBookDiversity_3.html), they are neither plants nor animals. In that case, what are they? Any help would be very deeply appreciated, thanks!

2007-03-19 22:19:16 · 4 answers · asked by tigertrot1986 3

Hi

Does anyone has a protocol of the preparation of medium for DH5 Alpha bacteria cells for OPTIMUM growth?

2007-03-19 22:01:30 · 3 answers · asked by PIPI B 4

Why do we have people living in, not conducive to apes, cold climates? Why, when, how, would the first ape like or man like creatures go to a climate that is contrary to their habitat? Other than zoos, I seriously doubt that there are any apes calling, Alaska, Iceland, the North Pole, etc their home. I assume that, per the theory of evolution, life ,espically ape's, started in Africa or maybe South America. When and why would these yet man creatures, go to such locations? How did they get there? Were they smart enough to build boats? Did they know what they were getting into? I'm talking apes or ape like creatures, not yet fully man, in this question. Thank You.

2007-03-19 21:43:42 · 5 answers · asked by Anonymous

2007-03-19 20:50:14 · 3 answers · asked by Anonymous

2007-03-19 20:11:05 · 0 answers · asked by michaelvanhoff 1

I saw this scenario on an x-files show, and though I may severely doubt the hallucinogens part, the idea that carnivorous organisms that span acres (fungii?) seems likely.

If there are such things, can you guys tell me the name of it, or an example location, encyclopedia/wikipedia/news url, etc?

2007-03-19 20:03:43 · 2 answers · asked by Edward M 1

well in class we were doing this experiment when we get union skins under the microscope we then put methylene on them and put cover slips on that and blah blah blah anyways there was a couple of questions i didnt understand 1 was "why did the feild of view decrease?" another was"why did you see less in high power on the magnifying scope" and wat was the use of stain (wat is stain????:S) plz help me:( i dont want to fail:P


p.s my science teacher sux at explaing things...

2007-03-19 19:31:33 · 3 answers · asked by jazzie fizzle 1

How is the exact mechanism of phytohaemagglutinin (PHA) in stimulating cell cycle of mammals?

2007-03-19 19:30:58 · 2 answers · asked by Mukh S 1

2. Present an overview of two classical experiments which demonstrated that DNA is the genetic material. Also, can RNA be the genetic material? Explain.


I don't no how to answer this.. any1 can help? thank you u advance..

2007-03-19 19:12:51 · 2 answers · asked by Anonymous

I'm just curious. No bombardment please.

2007-03-19 18:59:13 · 4 answers · asked by Anonymous

2007-03-19 18:42:00 · 6 answers · asked by greg r 1

please help! Thanks

2007-03-19 18:26:18 · 3 answers · asked by Josh 3