Search found 12 matches

by bobc2
Mon Sep 14, 2009 2:55 am
Forum: General Discussion
Topic: How is water vapor a greenhouse gas?
Replies: 8
Views: 7525

Re: How is water vapor a greenhouse gas?

Found these percentages on Wickipedia (by weight). Looks like CO2 is small compared to water. Nitrogen (N2) 78.084% Oxygen (O2) 20.946% Water (H2O) >1% Argon (Ar) 0.934% Carbon dioxide (CO2) 0.0383 % Neon (Ne) 0.001818 % Helium (He) 0.000524 % Methane (CH4) 0.0001745 % Krypton (Kr) 0.000114% Hydroge...
by bobc2
Sat Sep 12, 2009 3:39 pm
Forum: General Discussion
Topic: How is water vapor a greenhouse gas?
Replies: 8
Views: 7525

Re: How is water vapor a greenhouse gas?

What are the percentages of CO2, H2O and CH4 by weight? By numbers of molecules?
by bobc2
Sat Sep 12, 2009 3:32 pm
Forum: Evolution
Topic: Question About Common Descent
Replies: 5
Views: 13301

Re: Question About Common Descent

Thanks a lot for your response, Gary. I Haven't seen that kind of treatment before. I did a quick review of your presentation and downloaded a copy so I can study it in detail. Looks like you are doing some impressive work there and I appreciate your effort and willingness to share.
by bobc2
Sat Sep 05, 2009 1:32 pm
Forum: PDF & Doc Files
Topic: summary of cell division
Replies: 9
Views: 31486

Re: summary of cell division

MrMistery,

That was an altogether masterful job. The best I've seen on this. Appreciate it very much.
by bobc2
Sat Sep 05, 2009 3:23 am
Forum: Microbiology
Topic: origin of virus
Replies: 3
Views: 3779

Re:

mith wrote:do some research


Couldn't every question submitted to the forum be answered this way?
by bobc2
Sat Sep 05, 2009 3:16 am
Forum: Molecular Biology
Topic: Structure of Chromosomes
Replies: 4
Views: 8869

Re: Structure of Chromosomes

Canalon, we are definitely on the same page with your characterization of a molecule. In this instance I would say that it is the totality of all bonded atoms of the double helix that make DNA a single molecule.
by bobc2
Sat Sep 05, 2009 1:49 am
Forum: General Discussion
Topic: How is water vapor a greenhouse gas?
Replies: 8
Views: 7525

Re: How is water vapor a greenhouse gas?

How do these three gases rate in the order of effect on global warming (water, CO2, methane)?
by bobc2
Fri Sep 04, 2009 7:44 pm
Forum: Genetics
Topic: what is gametes in DNA?
Replies: 3
Views: 11038

Re: what is gametes in DNA?

If you insert a new gene, is it necessary to replace another gene with it? That is, does DNA have a fixed number of genes, such that the specific number of genes must be maintained--otherwise the DNA would be defective? Do both gamete mates necessarily have the same number of genes? And the same num...
by bobc2
Fri Sep 04, 2009 7:35 pm
Forum: Evolution
Topic: Question About Common Descent
Replies: 5
Views: 13301

Re: Question About Common Descent

Thanks for those comments, you guys. I appreciate it very much.
by bobc2
Fri Sep 04, 2009 7:30 pm
Forum: Molecular Biology
Topic: Structure of Chromosomes
Replies: 4
Views: 8869

Re: Structure of Chromosomes

Thank you very much, Canalon. However, I do question your notion that DNA should be counted as two molecules. The joining by hydrogen bonds qualifies the structure as a single molecule. By that reasoning you would always be looking at the vast number of single complex molecules that can be recognize...
by bobc2
Fri Sep 04, 2009 5:46 pm
Forum: Evolution
Topic: Question About Common Descent
Replies: 5
Views: 13301

Question About Common Descent

Could someone inform me about the status of common descent at the molecular level? In particular I would like to know if, from the study of biochemistry and evolution, it has been established that the various primative molecular life forms developed from a single sequence of chemical activities at o...
by bobc2
Fri Sep 04, 2009 5:17 pm
Forum: Molecular Biology
Topic: Structure of Chromosomes
Replies: 4
Views: 8869

Structure of Chromosomes

Does each chromosome in a human cell contain one complete DNA molecule, so that there are 46 separate DNA molecules, one for each chromosome? Or does a single DNA molecule continue as an extended filament, running in and out of one chromosome, then proceeding to the next--eventually threading its wa...