Biology - March 2007

2007-03-23 06:33:15 · 4 answers · asked by angy_4ever2003 2

I know the obvious-- salts washed from the skin and allowed to evaporate (mixed sodium and potassium salts, IIRC), impure ammonia from the urine, impure hydrochloric acid from the gastric juice, and methane from the obvious source.

Any others? I mean, any others not requiring a great deal of extraction or processing; I'm not talking about getting iron out of the blood.

I'm working on a story involving people discovering chemistry (not alchemy, please!) and having extremely limited resources with which to work. Please do not refer me to internet references or textbooks, because my characters do not have access to them. Persons who disregard this will obviously not get Best Answer!

Thanks to all who answer

2007-03-23 06:31:12 · 1 answers · asked by cdf-rom 7

There is much evidence of neotenous factors influencing human evolution. Do you think it is still a factor in human natural/sexual selection?

2007-03-23 06:25:47 · 4 answers · asked by Anonymous

a. DNA, RNA, mitochondria
b. membrane, DNA, cytoplasm
c. mitocgondria, chloroplasts, membranes
d. a membrane, organelles, a nucleus

2007-03-23 06:22:06 · 11 answers · asked by Anonymous

1. The vascular tissues is leaves form (A) veins (B) guard cells (C) petioles (D) tracheids

2. Growing trees for lumber, paper, and food crops is called (A) forestry (B) silviculture (C) farming (D) gardening.

2007-03-23 06:12:14 · 3 answers · asked by confidential 2

Well you never know unless you ask!!

2007-03-23 06:09:03 · 21 answers · asked by ? 5

why is this dangerous to the human body

2007-03-23 06:06:45 · 9 answers · asked by loppy loo 1

What is gene farming, gene pharming and what is its impact on the environment? Especially, the positive aspects...

2007-03-23 06:05:45 · 2 answers · asked by mad g 2

a. a recongnition protein
b. a receptor protein
c. a channel protein
d. protein filaments the cytoplasm

2007-03-23 06:00:47 · 3 answers · asked by Anonymous

How could you determine whether the turbidity in your nutrien broth tube was from a mixture of diffrent microbes or from the growth of only one kind of microbe?

2007-03-23 05:59:07 · 2 answers · asked by Moamen 1

a. an area of higher concentration of that type of molecule to an area of lower concentration.
b. am area of lower concentration of that type of molecule to an area of higher concentration.
c. outside the cell to inside the cell.

2007-03-23 05:54:26 · 3 answers · asked by Anonymous

2007-03-23 05:51:13 · 5 answers · asked by Anonymous

2007-03-23 05:38:54 · 12 answers · asked by Claire C 1

If yes, what is that opening for? is it possible for a female to produce any kind of secretions from it (like males do)?

2007-03-23 05:29:46 · 1 answers · asked by a7la_mn_al3assal 1

is it through the small arteries, small veins, arterioles, or capillaries?

2007-03-23 04:29:58 · 0 answers · asked by Turtle 1

2007-03-23 03:49:12 · 7 answers · asked by mistyhitsman 1

2007-03-23 03:26:15 · 4 answers · asked by dornelltanksley 1

I am curious...does ovulation alternate sides every month or is the side random? My dr. said the sides are random,,I find that strange..what do you think?

2007-03-23 02:44:58 · 3 answers · asked by Anonymous

2007-03-23 02:37:51 · 6 answers · asked by Cheng Yingwei 3

What is the structure of a red blood cell like?

2007-03-23 02:08:02 · 7 answers · asked by Anonymous

I'm sure that there are many religious explanations for this, but I'm looking for a biological one. If cells keep on replicating themselves, why don't organs, muscles and other things stay the same? Why would they get weak? I understand why skin would get wrinkly, and not stay smooth, but not about other body parts.

P.S. I'm not looking for emotional support here(I'm not old), I'm just curious.

2007-03-23 02:06:00 · 2 answers · asked by Ory O Oreo 3

2007-03-23 01:51:05 · 14 answers · asked by peterlinya70 2

pls they shud hav all details and of high skool level ok?sum topicss i found -

Do different brands of orange juice contain different levels of vitamin C?
Does Controlled Atmosphere Storage Affect the Malic Acid and Starch Levels in Apples?
Does the PH level of the acid in our stomachs affect the digestion of proteins?
How does the sugar concentration vary in different brands of apple juices?
Make your own PH indicator using vegetables
What is the effect of heat and acids on milk proteins?



BIO.-
Does jet-lag affect the performance of professional athletes?
Does caffeine raise a person's blood pressure?
What does phosphoric acid do to tooth enamel?
its fine if u get information on these topics or any other but the level has to be of high skool and i require the ans. within a week


and pls. remember i need the details
thanks

2007-03-23 01:43:51 · 6 answers · asked by kitty 3

2007-03-23 01:14:34 · 2 answers · asked by Anonymous

Red-green colorblindness is a sex-linked trait. A woman with normal color vision, whose father was colorblind, mates with a colorblind man. What chance do each of their sons have of being colorblind?

2007-03-23 00:43:13 · 6 answers · asked by Gee 1

Sure, Darwin found plenty of evidence for evolution on the Galapagos... but it's still a theory. I think that because though there are many athiests (who are pretty good at practicing law) in our country, not too many people would be religiously offended by their students learning about intelligent design or creationism. Why the heck don't they let students be taught those, all in their biology class?

2007-03-23 00:22:01 · 15 answers · asked by Anonymous

I'm not an evolutionist but do not insult the idea. but I was wondering with all these weird things being born like the six legged goat or the funky pig that had 3 eyes and other stuff like this do you believe maybe we are going though an evolutioary change in some spiecies. possibly because of the threat of global warming or maybe just nature moving forward or could it just be genitic flukes. all seam to have a good point behind them what do you think(non evolutionist please stay out of this one its for the idea of science thinking only)

2007-03-22 23:45:55 · 10 answers · asked by Ash 6

what is wrong with manipulating reproduction?
and wats wrong with manipulating it in dosmestic animals?

2007-03-22 23:43:54 · 7 answers · asked by emily 1

why do we have more red blood cells in our blood stream at high altitude€?

2007-03-22 23:21:00 · 7 answers · asked by francesca s 2

Not ebay, Biology

2007-03-22 23:11:37 · 2 answers · asked by Anonymous