Biology - January 2007

how does bacterium's cell walls protect it?

2007-01-25 14:08:26 · 2 answers · asked by Yolanda P 1

I have read in a science journal of a new method of environmentally friendly corpse disposal, where the body is actually frozen solid with liquid nitrogen & then placed in some kind of machine that combines violent high frequency vibration & ultrasonics to basically disentergrate the body to organic dust. Has anyone ever heard of this ? Apparently the Swiss are involved with the R&D & already sucessfully using it on animals , pets etc. Does not pollute ground with decomposing matter or pollute air with cremation & the remains take up much less space than conventional burial. I assume they remove all jewellery , what about artificial body parts i.e metal hips , knees , teeth fillings etc. They say it is environ friendly because the liquid nitro can be used again & again.

2007-01-25 13:55:25 · 1 answers · asked by Juggernaut 2

if an onion has a 2n number of 16 how many homologous pairs would be found in its diploid cells?

2007-01-25 13:49:00 · 8 answers · asked by blund_chick07 1

2007-01-25 13:48:47 · 7 answers · asked by nawacissej 1

some questions that i need help answering

what serves as an assembly line for each protein manufactured by the cell?

how many letter are in each word of the dna or rna language?

how many letters are in the dna and rna code or alphabet?

Why is it possible to have more then one kind of dna or Rna?

what is the origin of the initial instructions for protein sythesis?

if you can answer most of the questions, you'll get 20 pts

2007-01-25 13:45:39 · 1 answers · asked by rose64190 1

1. HOW & WHERE does gas exchange take place in Sponges, Cnidarians, & Flatworms?

2. What is one advantage of an animal having bilateral symmetry?

3. How does antibiotics resistance support the theory of natural selection?

4.Why doesn't the process of natural selection produce more perfect adaptations than it does?

5. Although a religious controversy with the evolutionary theory exists today, give an argument for why such a controversy is Invalid.
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1. I'm still searching for the other 2 but I believe Flatworms= Gas exchange occurs across their body wall & there is Diffusion of O2 into the body & CO2 diffuses out.

2. Idk but I read something about it helps reproduction? I can't really find any Real info on it and my book isn't helping.

3-5. ?
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I would really appreciate any help and explanations. Thank You! = )

2007-01-25 13:45:16 · 4 answers · asked by Miss*Curious 5

I see this term thrown around in biology...what does it mean?

2007-01-25 13:17:15 · 6 answers · asked by An Agent of Chaos 5

a few more questions:

Which organelle in plant cells enables them to make food?
Do bacteria have organs?explain your answer.
How does the skeletal system interact with the digestive system?
How does the skeletal system interact with the endocrine system?

answer what u can but only answer if u really know the answer

2007-01-25 13:12:07 · 3 answers · asked by jenjen 3

2007-01-25 13:06:20 · 8 answers · asked by Anonymous

only if u have the right answer

2007-01-25 13:05:08 · 7 answers · asked by jenjen 3

2007-01-25 12:58:50 · 2 answers · asked by Anonymous

a.)cellular respiration
b.)using oxygen
c.)using nitrogen
d.)fermentation

As an endospore,a bacterium
a.)producees toxins
b.)dries out
c.)causes diseases
d.)is protected

2007-01-25 12:57:13 · 4 answers · asked by Anonymous

2007-01-25 12:56:01 · 3 answers · asked by Anonymous

Also, what is hydrolysis. How do they both work and what do they do?

2007-01-25 12:54:58 · 2 answers · asked by Anonymous

I received my Donor Identification card from the Central Blood Bank the other day, in which I learned my blood type for the first time (it's stated on the card; it's B-). My parents have O+ and AB+ as blood types. How the heck do I have B-? And how come, if that was so, why didn't that blastofetalis thing occur from having different Rh factors being transferred through the placenta? Or is it just a mistake do you think? I took AP Biology, but I never really encountered this situation. Thoughts?

2007-01-25 12:48:14 · 6 answers · asked by Anonymous

_____9.Bacterium with a new genetic makeup is produced.
____10.Circular chromosomes is copied.
____11.Genetic material is transferred through a pilus.
____12.Two identical cells are produced.
____13.Sexual reproduction occurs.

2007-01-25 12:47:15 · 2 answers · asked by Anonymous

Ok I'm not that bright...

A team of biology students investigate the relationship between temperature and number of cells for 3 differnet groups of cultured cells. What is the Independent and the dependent variable?

thanxs :D

2007-01-25 12:41:04 · 5 answers · asked by Commando Kick Ass 1

what is the difference between gram-positive bacteria and gram-negative bactria?

2007-01-25 12:37:15 · 3 answers · asked by Anonymous

2007-01-25 12:17:20 · 6 answers · asked by Bella 2

Is there a interphase in meiosis?

2007-01-25 12:14:07 · 7 answers · asked by ? 2

2007-01-25 12:05:06 · 2 answers · asked by Peggy S 1

2007-01-25 11:32:35 · 1 answers · asked by Anonymous

How does a cell change shape? If I added a drug to a cell and it changed shape...how did this occur?

2007-01-25 11:32:20 · 2 answers · asked by An Agent of Chaos 5

food passes from the _______to the __________ to the _________ and then to the ____________, where gastric juices break up proteins and other molecules.

2007-01-25 11:30:35 · 4 answers · asked by blahhhhhh 2

I have trouble understanding what they are.

2007-01-25 11:19:13 · 2 answers · asked by ibid 3

2007-01-25 11:11:38 · 9 answers · asked by Kadiatou B 1

2007-01-25 11:04:41 · 2 answers · asked by skm12 1

2007-01-25 10:47:14 · 12 answers · asked by derrick2811 1

2007-01-25 10:45:21 · 3 answers · asked by the_legacy_of_the_drow 1

Science is quickly evolving, and before you know it a full on "head transplant" will be not only possible, but actually carried out. Religious advocates say that removing one's head from one's body will deteriorate the integrity of the individual involved.
The real question is this: is the soul attached to the human body itself as in the heart, or is it a perceptive state of mind preserved in the brain. And with the removal of one's body, will the individual remain the same, or is it safe to say that with such a dramatic change it is impossible to remain who you once were.

2007-01-25 10:44:39 · 11 answers · asked by Anonymous