Biology - August 2007

If a compound causes cancer-cell apoptosis in vivo, how likely is it to do the same in vitro?

2007-08-12 08:19:08 · 3 answers · asked by skybluu 2

are the UV rays that help the skin to produce the vitamin D? why do we have to avoid them ?

2007-08-12 06:24:28 · 4 answers · asked by Pimpinella 2

2007-08-12 05:56:42 · 5 answers · asked by Anonymous

we die fast if we slice our pulse ryt??but wat if our ryt of left arm was shot by a shotgun or anything..our pulse is in our wrist ryt??hope that u knw wat i mean

2007-08-12 03:38:48 · 1 answers · asked by RiKu XIII 1

I just curious what will happen to the DNA of the transfuse blood. Will it change to the receicers DNA. And as a follow-up question, will the transplanted bone marrow will produce blood of the same DNA as the donor or of the receiver.

2007-08-12 02:05:31 · 4 answers · asked by loyd 1

Their are a couple of twins I know and a few of my friends and I were discussing them.

I know that if two twins came from seperate eggs that were seperately fertilised then they are just 'siblings sharing a womb'.

Now, if they are both from a single fertilised egg that subsequently seperated they have 'identical' DNA. Is it possible that they may still look slightly different?

The twins I know look too much alike to be non identical but they can just about be individually recognised; especially when they are next to one another.

So are they still identical?

Also - while I'm here - some of my friends maintained that identical twins could be different sexes. I just need conformation on this. If two people have identical DNA then they must also both have XX or XY chromosomes so therefore they MUST be the same sex. Am I right?

2007-08-11 20:14:45 · 8 answers · asked by tuthutop 2

I know that they're in each cell. Every cell has the same amount, and that makes us human.
And they why we can't be bred by..giraffes! lol and same for different animal speicies! lol
am i right?

i remember we have 24....am i right on that, too?

thanx!

2007-08-11 16:43:32 · 9 answers · asked by Anonymous

then chaged there mind and went back to school to be a nurse and went two more years? i was just wondering if i was alone bc i just now am graduating and decided to go back but feel like i am going the long way and wasting a lot of time just bc i didn't know what i wanted to do previously

2007-08-11 16:42:41 · 2 answers · asked by Anonymous

I've heard conflicting answers as to which water absorbs faster in bloodstream. When you drink water, which water absorbs into your bloodstream faster, lukewarm water or cold water? More times than not I hear it is cold water, but why? I would think it would be lukewarm, and if so, can anybody post why? Thanks.

2007-08-11 15:24:58 · 2 answers · asked by Anonymous

How are boogers formed? And why, what makes them the shape they are, and why are they there?

2007-08-11 12:00:43 · 3 answers · asked by rachel t 3

2007-08-11 11:40:44 · 11 answers · asked by chato r 1

2007-08-11 11:04:29 · 9 answers · asked by chato r 1

"BIG BANG THEORY" is one of the largely accepted probability for the birth of our universe. But what would have been the situation before the big bang took place?

What substance/what matter was there which eventually caused "big bang"?

If there was anything then, how long was it there ?

2007-08-11 10:59:21 · 5 answers · asked by Anonymous

I have a book with no explanation. For example.
What is the mRNA complement, from 5'-3', of the following DNA sequence?

5'-GATCCCGCTAAGGCCT-3'

Answer: 5'-aggccuuagcccauc-3'

This is the answer but my question is how come, I mean if DNA uses the opposite. Meaning there is Adenine, Guanine, Thymine and Uracil, why isn't the opposite of the first letter "Uracil" rather than the actual answer adenine? Can someone please explain this too me.

2007-08-11 09:57:41 · 6 answers · asked by Philip B 1

Any links. Thanks.

2007-08-11 08:33:12 · 1 answers · asked by toodd 4

Can a baby who is in the womb of a surrogate mother receive any of her DNA? I know the baby would not receive genetic DNA, but what about mitochondrial DNA?

2007-08-11 07:43:37 · 6 answers · asked by danieloholic 6

ok my gurl needs help on her homework right with archebacteria and eaubacteria and she got to put them bacteria in the right group but the pictures are black and white and theres no information i guess you got to classify them by shapes and her descriptions are:

1.whole bunch of little circles
2.looks like pills
3.you kno a snail when u take the shell off the little slimy **** on the bottom they used that shape squiggly ****(like garry from spongebob)
4.blobs shape thingy
5.Jelly bean thingy inside looks like lines(inside) outside looks like is fuzzy(thejelly bean)

i juss want to know with that descriptions which one are archebacteria and eubacteria....



THANKS!!!!!!

2007-08-11 07:25:28 · 2 answers · asked by Tha best!! 2

The development of follicles is stimulated by the hormone ___________, which is secreted by the _______ _______ .

2007-08-11 06:41:03 · 4 answers · asked by ☮ 5

Viruses, bacteria...?

2007-08-11 06:24:16 · 3 answers · asked by Anonymous

Personal opinions are welcome and if you have any articles or sources about this that would be great!

2007-08-11 05:08:59 · 4 answers · asked by Anonymous

2007-08-11 01:15:20 · 12 answers · asked by doctrician_1 1

2007-08-10 23:12:03 · 5 answers · asked by Anonymous

I have learned that bacteria could be rodlike(bacilli), spherical(coccus) or curved(vibrio, spirillum, spirochete). Can anyone explain why they are shaped like so? Is it shaped like that for a specific purpose or function? Like in the case of red blood cells, which are bi-concave disk shaped because that shape allows it to pick up and carry the maximum amount of oxygen as compared to other shapes.

2007-08-10 23:10:00 · 2 answers · asked by Mel 1

IF not, can you explain the process of it's youth

If they are, how is it formed?

2007-08-10 21:51:34 · 3 answers · asked by lolman180 3

2007-08-10 21:38:45 · 3 answers · asked by thomas 1

Ok, if life started from some gene or fungi, my question is, for all the extint animals, will they ever come back?????????

if so why haven't dinosaurs returned??????????

2007-08-10 20:56:05 · 24 answers · asked by Anonymous

why are there only 2 different genders????????
if we started from fungi or something there should be lots of different genders, looking at all creation, theres only 2.

2007-08-10 20:55:58 · 25 answers · asked by Anonymous

i just wanna know

2007-08-10 20:22:36 · 3 answers · asked by thabigbossoftha13 1

why does having sandier soil make the soil pH rise faster when adding phostphates?

2007-08-10 20:20:18 · 1 answers · asked by Anonymous

i have always wondered....xD

2007-08-10 17:25:45 · 14 answers · asked by hey123 4